“The Other Side of Paradise”: Dateline NBC Revisits Sandra Galas Homicide August 28 2026

NBC’s Dateline presents “The Other Side of Paradise” on Friday, August 28, 2026, at 10/9c, with correspondent Keith Morrison examining the murder of Sandra “Sandy” Galas and the long struggle to hold someone accountable for her death.

The case began on the Hawaiian island of Kauai in January 2006, when the young mother was found assaulted and strangled in the garage of her ‘Ele‘ele home. Investigators focused on two men close to Sandra, including her estranged husband, Darren Galas, but questions about the strength of the evidence prevented a murder prosecution from moving forward.

What followed was a case that stretched across 12 years, survived periods when the investigation appeared to have reached a dead end and divided Sandra’s family between hope and frustration. Advances in forensic testing, a new examination of old evidence and records documenting the breakdown of Sandra’s marriage helped authorities build a case against Darren. Yet even after he was charged with murder, prosecutors faced the possibility that a jury could acquit him.

“The Other Side of Paradise” follows the murder investigation, the evidence against Darren Galas and the extraordinary campaign led by Sandra’s family, including her father, Larry Mendonca, who spent the final years of his life demanding justice for his daughter.

• Who Was Sandra Galas & What Happened to Her? 2026 Update & Profile
• Who Is Darren Galas & Where Is He Now? 2026 Update & Profile

Sandra Galas Was a Young Mother Building a New Life

Sandra Galas was in her twenties and the mother of two young boys when her marriage to Darren Galas broke down. The couple had married young, but by the period before Sandra’s death, their relationship had deteriorated and they were separated while moving toward divorce.

According to accounts of the investigation, Sandra learned that Darren had been unfaithful. The separation did not provide a complete break between them because they shared custody of their sons. Their children remained a connection between the estranged couple, requiring continued contact as they dealt with custody arrangements and exchanges.

Sandra also had a new relationship. Her boyfriend, Ryan Shinjo, would become important to the investigation, both because of his connection to Sandra and because of what happened on the day she was killed.

Behind the details of Sandra’s personal life were signs that her relationship with Darren had become a source of fear. Evidence uncovered years after her death would include communications Sandra had sent to her divorce attorney describing concerns about her estranged husband.

Those records would become part of a larger picture investigators assembled long after the initial homicide investigation stalled.

Sandra Is Found Strangled in Her ‘Ele‘ele Garage

On January 25, 2006, Sandra was found dead at her home in ‘Ele‘ele, a community on the southern side of Kauai. Ryan Shinjo discovered her in the garage.

Sandra had been assaulted and strangled.

The crime presented a disturbing contrast with the public image of Kauai, an island known throughout the world for its beaches, mountains and resorts. Someone had attacked a young mother at her own home, leaving investigators to determine whether the killer was a stranger or someone within Sandra’s personal circle.

The investigation focused on the people closest to her. Detectives examined Sandra’s relationships, the circumstances of her separation and the movements of those who had reason to be around her.

Two men emerged as subjects of particular interest: Shinjo, the boyfriend who found her, and Darren, the estranged husband with whom she was engaged in a contentious separation.

Ryan Shinjo and Darren Galas Both Face Scrutiny

Police had reasons to investigate both men. Shinjo’s behavior raised questions for detectives, while Darren’s relationship with Sandra gave investigators another line of inquiry. Accounts of the investigation state that both men underwent polygraph examinations and both failed.

Polygraph results are not the equivalent of physical evidence establishing guilt. Detectives still needed to determine what had happened inside Sandra’s home and whether either man could be connected to her death through evidence that could withstand scrutiny in court.

Darren told investigators that Sandra had been expected to collect their sons from his home on the morning she died but never arrived. Investigators began identifying problems with parts of his account.

Police arrested Darren on suspicion of murder while executing a search of his home. The action demonstrated how much attention had turned toward him, but suspicion and inconsistencies did not give authorities enough evidence to sustain a homicide case.

Darren was released.

The release marked the beginning of a painful reality for Sandra’s family: police could have a principal suspect without having enough admissible evidence to prove that suspect committed murder.

Darren Galas Is Released and Gains Custody of Sandra’s Sons

The consequences of the stalled investigation extended beyond the homicide case. After his release, Darren obtained custody of the two boys he had shared with Sandra.

For her family, the situation compounded their grief. Sandra was dead, the person investigators had scrutinized remained free and the legal system had produced no criminal resolution.

Shinjo also remained a potential alternative suspect. His life soon became the subject of a separate criminal investigation. Federal authorities arrested him in connection with a methamphetamine trafficking operation, and he was imprisoned.

Once incarcerated, Shinjo stopped cooperating with investigators about Sandra’s death, according to later accounts of the case.

His criminal history created another complication. If prosecutors charged Darren, defense attorneys could argue that police had overlooked a viable alternative suspect: Sandra’s boyfriend, a man who had discovered her body and who later went to federal prison for drug crimes.

That problem would continue to influence the prosecution years later.

Larry Mendonca Refuses to Let His Daughter Become a Forgotten Victim

Sandra’s father, Larry Mendonca, became one of the defining figures in the case. For him, his daughter’s murder was not something that could be placed in an evidence room and revisited when resources became available.

He wanted an answer and an arrest.

Larry and Sandra’s family continued pressing authorities as months became years. They sought information, maintained public attention and refused to allow Sandra to become another name attached to an unsolved homicide.

Sandra’s brother, Lawrence Mendonca, later described the agony of watching a suspect continue living his life while Sandra’s family remained trapped in the aftermath of her death.

Their efforts became important because the investigation did not move toward a quick prosecution. The family faced the possibility that no one would ever be tried for killing Sandra.

Larry would spend much of the remainder of his life fighting that possibility.

The Murder Investigation Goes Cold

The initial investigation failed to produce enough evidence for prosecutors to charge Darren with murder. As time passed, Sandra’s case became a cold case.

Cold cases present problems beyond the original lack of evidence. Memories can fade. Witnesses can become harder to locate. Investigators retire or move to other assignments. Physical evidence can deteriorate, and witnesses whose testimony might become important can die.

The passage of time also changes the courtroom calculation. Even when police believe they know who committed a crime, prosecutors must consider whether they can prove that conclusion beyond a reasonable doubt to 12 jurors.

Sandra’s family was forced to live within the gap between what investigators suspected and what prosecutors believed they could prove.

Then forensic science began to change the case.

New DNA Testing Links Darren Galas to Sandra’s Clothing

Advances in forensic technology allowed investigators to return to evidence collected during the original investigation.

By 2008, testing produced a significant development: Darren Galas’ DNA was found on clothing Sandra had been wearing when she was killed.

The result appeared to provide investigators with the physical connection they had lacked. Yet it did not produce an immediate prosecution.

Sandra and Darren remained legally married when she died. Because they had an intimate relationship and continued interacting through their children, the presence of his DNA could have an innocent explanation. Prosecutors could not rely on the DNA match alone to establish that Darren had been present during the attack.

That distinction became another devastating setback for Sandra’s family.

The forensic evidence strengthened suspicion, but the fundamental problem remained. Prosecutors needed a case capable of establishing not only that Darren had contact with Sandra, but that he was responsible for the violence that ended her life.

A New Investigation Begins Under Kauai Police Chief Darryl Perry

A major change came in 2012, when Kauai Police Chief Darryl Perry assigned a new investigator to Sandra’s case.

Rather than treating the earlier investigation as a finished product, the detective went back through the evidence and reconstructed the case.

That approach produced information that acquired new significance when considered alongside the forensic evidence. Investigators examined Sandra’s marriage, her fears before her death and Darren’s own records of his interactions with her.

Among the evidence were letters Sandra had written to her divorce attorney.

The communications indicated that Sandra had been afraid of Darren. In the context of a homicide involving estranged spouses, the letters offered investigators evidence about the state of the relationship before Sandra was killed.

But another discovery would prove even more unusual.

Darren’s Calendar Becomes a Key Piece of Evidence

Investigators discovered that Darren maintained a calendar containing detailed records of his interactions and disputes with Sandra.

The entries documented occasions when Sandra had angered him, including times when she was late collecting their children. His record keeping gave investigators a window into the conflict between the estranged spouses.

There was an entry for almost every day.

The striking exception was January 25, 2006, the day Sandra was murdered.

Darren had told investigators that Sandra was expected to collect the boys that morning but had failed to appear. Based on his pattern of documenting problems involving Sandra, investigators considered the absence of an entry significant.

The calendar did not constitute a confession. Nor could it establish on its own that Darren had killed Sandra. Combined with the DNA evidence, Sandra’s communications with her attorney, Darren’s earlier statements and the history of the marriage, however, it became part of a circumstantial case.

Investigators believed the pieces were beginning to fit together.

Investigators Build a Case Against Darren Galas

By revisiting the old evidence rather than searching for one decisive clue, investigators constructed a broader case.

There was Darren’s troubled relationship with Sandra. There were the concerns she had expressed before her death. There were questions surrounding his account of the day she died. There was his DNA on Sandra’s clothing. There was the detailed calendar with its conspicuous absence of an entry on the date of the homicide.

Authorities also had to account for Shinjo.

As the boyfriend who discovered Sandra and a man who later served federal prison time in a methamphetamine trafficking case, he offered the defense an obvious alternative theory.

That mattered because prosecutors did not have to prove that every piece of evidence pointed toward Darren. They had to prove Darren’s guilt beyond a reasonable doubt while anticipating arguments capable of creating doubt in the minds of jurors.

The investigation continued until authorities believed they had crossed the threshold necessary to bring the case back into the criminal justice system.

Darren Galas Is Charged With Murder

More than a decade after Sandra was strangled, Darren was indicted and charged with second-degree murder.

The arrest represented the breakthrough Sandra’s family had demanded for years. A case that once appeared destined to remain unsolved had produced a murder prosecution.

Darren was held on $1 million bail after his arrest.

Yet the indictment did not settle the case. The prosecution still had to prepare for the possibility of a trial involving evidence collected years earlier and a defense that could point toward another man.

Darren would remain free on bail for years while the case moved through the courts and prosecutors evaluated how their evidence would perform before a jury.

The long delay also meant that Sandra’s family had entered another period of waiting. An arrest had answered one question, but it did not guarantee a conviction.

Ryan Shinjo Becomes a Major Problem for the Prosecution

For prosecutors, Shinjo represented one of the largest risks in taking Darren to trial.

He had found Sandra’s body. Police had investigated him. His behavior had attracted suspicion. He had failed a polygraph examination. He later went to federal prison in connection with methamphetamine trafficking.

A defense attorney did not need to prove that Shinjo killed Sandra. The defense only needed to use the unanswered questions surrounding him to create reasonable doubt about Darren.

That possibility threatened the entire prosecution.

After Shinjo was released from federal custody, however, he spoke with investigators and provided information about violent behavior by Darren that he said he had witnessed.

His cooperation helped prosecutors, but it did not erase the weaknesses created by his own background or the circumstantial nature of much of the evidence against Darren.

The state faced a choice: proceed to trial on the murder charge and risk an acquittal, or negotiate a resolution that guaranteed a felony conviction and prison sentence.

The Case Does Not Go to a Murder Trial

The murder prosecution never reached a jury verdict.

In January 2018, prosecutors and Darren reached a plea agreement. Darren agreed to plead no contest to first-degree assault causing serious bodily injury, a Class B felony.

The agreement represented a substantial reduction from the second-degree murder charge.

A no-contest plea differs from a traditional guilty plea because the defendant does not formally admit the factual allegations underlying the charge. The defendant accepts the conviction and the court’s authority to impose punishment without contesting the charge at trial.

Judge Kathleen Watanabe accepted Darren’s plea and found him guilty.

For prosecutors, the agreement eliminated the possibility that a jury might acquit Darren and leave the state unable to punish him for Sandra’s death. For Sandra’s family, it was a painful compromise.

Their daughter and sister had been strangled to death. Twelve years later, the criminal case arising from that death was ending with an assault conviction rather than a murder conviction.

Why Prosecutors Accepted the First-Degree Assault Plea

The plea agreement reflected the risks created by the evidence.

The DNA evidence was important but open to challenge because Sandra and Darren were married and had maintained contact. The calendar was unusual and potentially persuasive but circumstantial. Sandra’s letters provided evidence concerning her fear and the state of the marriage, but they did not identify her killer through direct observation.

The defense also had Shinjo.

A murder trial would have required prosecutors to persuade jurors that the combined evidence excluded reasonable doubt despite the presence of another man who had been investigated as a suspect.

An acquittal would have ended the prosecution with Darren facing no prison sentence for Sandra’s death.

The first-degree assault plea guaranteed a felony conviction and exposed Darren to a maximum 10-year prison term. Prosecutors accepted certainty at the cost of abandoning the murder charge.

Sandra’s family was left to confront a question faced by many families in difficult homicide prosecutions: whether an imperfect conviction was preferable to risking no conviction at all.

Darren Galas Receives the Maximum 10-Year Prison Sentence

In May 2018, Darren returned to court for sentencing.

Judge Watanabe imposed an open 10-year prison term, the maximum sentence associated with the first-degree assault conviction.

Kauai Prosecuting Attorney Justin Kollar described Sandra as more than the victim at the center of a criminal case. She had been a mother, daughter and talented dancer whose death affected the wider Kauai community.

Kauai Police Chief Darryl Perry also acknowledged that the result could not undo Sandra’s death but expressed hope that Darren’s acceptance of legal responsibility would provide some closure to those who had loved her.

The sentence brought the criminal case to an end 12 years after Sandra was killed.

It was accountability, but it was not the murder conviction her family had spent years seeking.

Larry Mendonca Does Not Live to See the Case End

One of the most painful elements of the story is that Larry Mendonca did not survive to see the final courtroom resolution.

The father who had spent years demanding action suffered a fatal heart attack before Darren was sentenced.

Larry’s words nevertheless reached the courtroom.

A family member delivered a victim-impact statement on his behalf. It captured the divide between the sentence imposed on Darren and the permanent sentence Sandra’s family believed her murder had imposed on them.

Darren could serve a defined prison term. Sandra was gone for the rest of their lives.

Larry’s absence also underscored the cost of the 12 years required to resolve the case. Justice delayed in Sandra’s murder was measured not only in investigative files and court proceedings, but in years taken from family members who had waited for an answer.

The Never Forget Sandy G Movement Keeps Sandra’s Name Alive

Sandra’s family did more than pressure authorities to solve her murder.

Larry and Toshie Mendonca, Sandra’s parents, and her brother Lawrence created the Never Forget Sandy G Foundation, transforming the family’s campaign into an effort to help people affected by domestic violence.

The movement kept Sandra’s name visible throughout Kauai while raising money and awareness. The family produced bumper stickers, maintained public attention on the unresolved homicide and offered a $20,000 reward for information leading to an arrest and conviction.

A charity golf tournament became a central part of the campaign.

The event served two purposes while the murder remained unresolved. It generated money for services supporting domestic violence survivors while reminding the community that Sandra’s killer had not been brought to justice.

The fundraising did not stop when Darren was sentenced.

The tournament continued to support the YWCA, with later events raising thousands of dollars for programs assisting victims and survivors. Sandra’s family had turned a campaign created from an unsolved murder into a lasting community effort.

Sandra Galas’ Murder Became Part of a Wider Conversation About Domestic Violence

The circumstances preceding Sandra’s death gave the case significance beyond the question of who killed her.

Investigators uncovered evidence of conflict within her marriage and communications suggesting Sandra feared Darren. Her family then placed domestic violence awareness at the center of the movement created in her memory.

The case became associated across Kauai with the effort to recognize warning signs, support survivors and prevent other families from experiencing the same loss.

Public officials acknowledged that connection when the criminal case concluded.

For Sandra’s family, keeping her memory alive meant ensuring she was not remembered only for the circumstances of her death. The foundation connected the young mother they had lost with services capable of helping people facing violence in their own relationships.

The result became a second legacy of the case, separate from the courtroom outcome.

The Outcome Left Sandra’s Family With an Imperfect Form of Justice

There was no murder trial and no jury verdict declaring Darren Galas guilty of killing Sandra.

Instead, the criminal justice system produced a negotiated conclusion. Darren entered a no-contest plea to first-degree assault, was convicted and received the maximum 10-year prison sentence.

That distinction is central to understanding the case.

Authorities had once lacked enough evidence even to keep Darren in custody. Years later, new forensic analysis and a renewed investigation provided enough evidence to indict him for murder. Yet the evidence still carried weaknesses that prosecutors believed could threaten a conviction at trial.

The plea agreement removed that risk while producing a result that Sandra’s family found difficult to accept.

It was both an ending and a compromise: a prison sentence connected to Sandra’s death without the murder conviction that would have reflected the crime that started the case.

“The Other Side of Paradise” Revisits a 12-Year Search for Justice

The title of the Dateline episode captures the contradiction surrounding Sandra Galas’ story. Kauai is sold to much of the world as a tropical paradise. Sandra’s murder revealed a different story unfolding behind that image: a young mother killed at home, a troubled marriage, an investigation that went cold and a family forced to fight for more than a decade for a criminal case.

Keith Morrison’s report places Larry Mendonca’s persistence at the center of that journey. His determination helped keep Sandra’s name and murder before the public during years when an arrest appeared uncertain.

The case also shows why solving a homicide and prosecuting one are different challenges. Police suspicion focused on Darren early in the investigation. DNA later strengthened the case. Sandra’s letters and Darren’s calendar added circumstantial evidence. A renewed investigation produced an indictment. None of those developments erased the prosecution’s concern that reasonable doubt could prevent a murder conviction.

Sandra’s family ultimately received a form of accountability, but Larry did not live to witness its conclusion, and the legal outcome never matched the second-degree murder charge Darren once faced.

More than two decades after Sandra was killed, her story remains tied to what her family did after her death. They kept pressure on investigators, kept her name before the Kauai community and built the Never Forget Sandy G movement into a source of support for domestic violence survivors.

NBC’s Dateline: “The Other Side of Paradise” airs Friday, August 28, 2026, at 10/9c on NBC. Keith Morrison reports on the murder of Sandra Galas, the evidence that brought investigators back to Darren Galas and the father who refused to allow his daughter’s case to disappear.

More “The Other Side of Paradise”

• “The Other Side of Paradise”: Dateline NBC Revisits Sandra Galas Homicide August 28 2026
• Who Was Sandra Galas & What Happened to Her? 2026 Update & Profile
• Who Is Darren Galas & Where Is He Now? 2026 Update & Profile