1977 Cold Case That Everyone Gave Up Just Got SOLVED

On January 21, 2025, two Honolulu homicide detectives walked quietly into a nursing home located in Millcreek, Utah, a peaceful suburb just outside Salt Lake City. They stepped into a private room, approached a hospital bed, and placed a sixty-six-year-old man under arrest. The charge laid against him was second-degree murder, stemming from a crime that had horrified the Hawaiian islands nearly half a century prior. The victim was a young girl whose life was violently cut short on the second floor of her own high school building in Honolulu. That tragic event had occurred forty-eight years earlier, in the spring of 1977. The young girl was Dawn Momohara.

The man arrested in that Utah care facility was not a stranger to the investigation. In fact, he had been a classmate of Dawn’s when she walked the halls of McKinley High School. His biological profile—captured on a pair of her shorts preserved in an evidence locker since the grim days of 1977—had sat in storage for decades. Back then, reading DNA was an impossible dream of science fiction. The technology simply did not exist to extract a genetic signature from microscopic traces of evidence. But time moves forward, and science eventually catches up to the darkest secrets that humanity tries to bury.

To truly understand the weight of this historic moment, one must look back at the life that was stolen and the quiet resilience of a family left behind in the wake of tragedy. Dawn Takeyo Momohara was born in December 1960 in Honolulu, entering a world marked by profound sorrow before she even took her first breath. Six months prior to her birth, her father, Takeyo Momohara, tragically lost his life in a devastating industrial accident at a local quarry in Nanakuli. He never had the chance to see his daughter, leaving Dawn to grow up without a paternal figure. She was raised entirely by her devoted mother, Mabel Hanayo Momohara, and her older sister, Faye, on the sun-drenched island of Oahu.

By the spring of 1977, Dawn had blossomed into a sixteen-year-old sophomore at McKinley High School, one of the oldest and most sprawling public educational institutions in Hawaii. Situated in the Moiliili neighborhood near the University of Hawaii at Manoa, McKinley’s campus features numerous historic buildings spread across a wide expanse. The English building, a prominent landmark on the grounds, sat on the ground floor with easily accessible entry points from the outside.

Dawn’s social world and daily routine revolved heavily around the McKinley theater group. Her circle of friends shared a passionate love for the dramatic arts, often rushing through their lunches in the school cafeteria so they could spend the remainder of their break tucked away in room W123. Located on the ground floor of the English building, that drama classroom served as a sanctuary for creativity, where Dawn and her peers spent countless hours running improvisation games, practicing skits, and sharing teenage laughter.

Friends who knew her during those vibrant high school days remembered her fondly. Tam Anderson, a fellow sophomore who met Dawn through the drama circle, spent numerous lunch periods immersed in improv exercises with her, recalling those breaks as a time of pure joy and camaraderie. Another friend, Lorna Soong, who was introduced to Dawn through her older sister Faye, described Dawn as a generally quiet yet deeply valued presence within their creative community. Anderson later noted that Dawn had been an active part of the theater group for roughly a year before her life was cruelly cut short.

The turning point of absolute horror arrived on the night of Sunday, March 20, 1977. Sometime between 9:00 and 10:00 p.m., a local resident was driving through the McKinley campus area with his girlfriend when he noticed a deeply unsettling sight. A vehicle was parked directly on the grassy area near the English building, its engine completely turned off, sitting in total silence. As the witness watched, a young man emerged from the ground floor steps of the building, moving purposefully toward the parked car.

An instinctual sense of alarm prompted the driver to circle his car around to get a closer look at the unusual situation. By the time he returned, however, both the vehicle and the mysterious man had vanished into the night, having departed in a hurried manner. The witness later provided a vivid description to authorities: the car was a two-door hardtop featuring louvered rear windows, painted maroon on the bottom and crisp white vinyl on top, bearing the classic hallmarks of a mid-1970s Pontiac LeMans or Buick Century. The young man walking near the building was described as Asian, roughly eighteen to twenty-two years old, standing between 5 feet 5 inches and 5 feet 7 inches tall, and weighing approximately 140 to 150 pounds.

The following morning, Monday, March 21, the true horror of that dark Sunday night was brought to light. Shortly after 7:30 a.m., before classes were scheduled to commence, a teacher walked into the English building and made a gruesome discovery on the second-floor hallway. Dawn Momohara was lying on her back, partially clothed, with a bright orange cloth tied with brutal tightness around her neck, completely cutting off her air supply. An autopsy later confirmed that the young sophomore had been both brutally sexually assaulted and strangled to death.

Forensic processing at the scene and during the autopsy recovered vital biological material, including sperm scrapings. Physical proof of a heinous crime existed in abundance, but the technological landscape of 1977 was entirely incapable of reading genetic profiles. While blood typing could narrow suspects down to broad percentages of the general population, individual identification through DNA remained decades away from reality. The scrapings and Dawn’s clothing were carefully sealed, cataloged, and placed into police evidence storage—a silent repository of unanswerable questions.

News of the murder swept across McKinley High School’s campus like wildfire on that Monday morning. Students arriving for first period heard the devastating whispers, while teachers walked past yellow police tape to reach rerouted classrooms. The very same English building where Dawn and her friends had spent joyful hours playing improv games in room W123 was suddenly transformed into a harrowing crime scene.

Mabel Momohara was forced to bury her youngest daughter. Faye suffered the heartbreaking loss of a sister she loved dearly, and the members of the theater group lost the heart of their creative circle. The Honolulu Police Department launched an aggressive investigation throughout the spring of 1977, pouring immense resources into tracking down every potential lead. On March 28, exactly one week after the murder, investigators interviewed two local brothers who had known Dawn through school. Both had attended McKinley High School; the older brother had graduated the previous year in 1976 and was serving in the U.S. Army Reserve after returning to Honolulu.

During their interviews, the older brother told detectives he had met Dawn at a school dance in late 1976 and last spoke with her at the McKinley Carnival in February 1977, where they chatted briefly about school and life. His younger brother, William, stated that he occasionally spoke with Dawn on the phone but denied any romantic or close relationship. Both brothers cooperated fully with law enforcement at the time. Neither was arrested, nor were they officially cleared, as detectives possessed no physical evidence connecting either man to the crime scene. The biological material sat locked in storage, mute and unreadable.

As the months of 1977 rolled on, tips flooded in from across the island of Oahu. Detectives chased every single name that crossed the tip line, comparing the witness’s detailed description of the maroon-and-white car and the young Asian suspect against everyone who might have frequented the campus that night. Yet, no individual matching both criteria surfaced. By the end of the year, the case file had grown thick with exhaustive interviews and frustrating dead ends. The investigation officially stalled, and the man responsible for Dawn’s murder walked out of his police interview to live his life freely for the next forty-eight years.

Decades passed in the cold case unit of the Honolulu Police Department. Detectives and supervisors came and went, but the physical file remained, a haunting reminder of an unsolved tragedy. The technological landscape slowly evolved. In 1998, the FBI launched CODIS, the national database for DNA profiles collected from convicted criminal offenders. However, CODIS was fundamentally limited: it only contained profiles of individuals mandated to provide DNA following a criminal conviction. If a killer had managed to avoid subsequent felony convictions, his genetic profile would never appear in the system.

Mabel Momohara lived for many years after the murder, carrying the profound grief of losing both her husband to a tragic industrial accident and her youngest daughter to a senseless act of violence, all without ever receiving closure or answers. Faye worked tirelessly to keep her sister’s memory alive, while Dawn’s childhood friends grew up, married, built careers, and moved to different cities, yet they never stopped talking about the girl from room W123 who never had the chance to graduate.

The file continued to be passed down through generations of investigators until March 2019, when Detective Michael Ogawa of the Honolulu Police Department’s Homicide Strategic Enforcement Detail picked up the cold case binder at headquarters on South Beretania Street. Reviewing the original 1977 interviews, the witness statements regarding the distinctive car, and the meticulous evidence notes indicating that biological material remained safely preserved in storage, Ogawa decided to take a fresh approach.

Detective Ogawa submitted a formal request to the HPD Scientific Identification Section’s Forensic Biology Unit, asking them to re-examine the historical items using modern DNA technology. Articles of clothing, including Dawn’s shorts and underwear, were subjected to rigorous new processes. What had been utterly impossible in 1977 became routine laboratory procedure by 2020. Technicians successfully isolated the biological material from the garments, carefully separating male DNA from female DNA, and ran comprehensive tests.

By May 2020, the breakthrough arrived: a DNA criminalist successfully recovered a partial profile of an unidentified male from the sperm collected on Dawn’s shorts. While not a full profile, it provided sufficient genetic markers to run against national databases. Detectives immediately entered the profile into CODIS, but no immediate match was returned. The profile sat in the lab waiting for a hit that did not come through traditional law enforcement channels.

While many modern cold cases are solved using genetic genealogy—where profiles are uploaded to consumer ancestry databases to build family trees outward—the Momohara case took a different, highly targeted path. In September 2023, fresh analytical insights led investigators right back to the original 1977 suspect list, focusing once more on the two brothers interviewed a week after the murder. The older brother, who had been eighteen or nineteen at the time of the killing, had graduated from McKinley in 1976, joined the Army Reserve, and interacted with Dawn just weeks before her death.

Collaborating closely with the FBI’s Honolulu field office and Homeland Security Investigations, Honolulu detectives tracked the younger brother to Chicago on the mainland. Utilizing a discreet and innovative strategy, investigators collected a confidential DNA sample from one of the younger brother’s adult children. Because children inherit specific genetic markers from their biological parents in predictable patterns, forensic analysts can determine whether a suspect is related to a sample donor.

The FBI tested the child’s sample and delivered the results to HPD. The comparison officially ruled out the younger brother as the source of the crime scene DNA. However, the data revealed something extraordinary: the child’s genetic profile displayed a distinct biological relationship with the unidentified male profile on file, pointing directly to a close family member—the older brother.

Following the murder, the older brother had left Hawaii, relocating across multiple western states over the decades without ever putting down permanent roots. By 2025, he was sixty-six years old and residing in a nursing home in Millcreek, Utah. Recognizing that the suspect was in declining health, Honolulu detectives flew to Utah in early January 2025, coordinating seamlessly with the Unified Police Department of Greater Salt Lake to conduct a covert surveillance operation.

Investigators patiently monitored his movements until they were able to discreetly collect a discarded biological sample he had touched, ensuring the operation remained entirely undetected by the aging man. The sample was rushed to the FBI for processing and subsequently forwarded to HPD for a direct comparison against the profile extracted from Dawn’s shorts in 2020.

The results were definitive and absolute. It was a positive match. The DNA recovered from the victim’s clothing belonged to Gideon Kapono Castro—the exact same man who had sat across from police interviewers on March 28, 1977, casually answering questions about a school dance and a carnival just seven days after taking a young girl’s life.

On the morning of January 21, 2025, law enforcement officers walked into Castro’s nursing home room and executed the arrest warrant. Charged with second-degree murder, Castro found himself facing the scales of justice after nearly half a century of evasion. Because Hawaii law imposes no statute of limitations on murder, the passage of forty-eight years did nothing to diminish the legal validity of the charge. Castro had lived under his own name the entire time, moving across California and other western states while maintaining a clean criminal record that prevented his DNA from ever entering CODIS.

On January 22, the Honolulu Police Department held a major press conference where Detective Ogawa walked the media through the painstaking timeline of the investigation, detailing how biological evidence preserved for decades finally yielded an arrest. Tam Anderson, reflecting on the news from the mainland where she now lived in her mid-sixties, along with other members of the former McKinley theater group, expressed immense gratitude that law enforcement never abandoned the pursuit of justice for the girl from room W123.

In February 2025, Castro appeared via video from a hospital bed during an extradition hearing in Salt Lake City, initially waiving his right to challenge extradition and agreeing to return voluntarily to Hawaii. However, the legal trajectory soon hit an unexpected turbulence. In March 2025, Honolulu prosecutors notified Utah authorities that they were not yet ready to proceed, citing significant complications involving a material witness and ongoing evidentiary evaluations. Consequently, Judge John Nielsen ordered Castro released, and on March 19, less than two months after his historic arrest, Castro walked out of the Salt Lake County facility.

Although a Honolulu prosecutor emphasized that the release represented merely a temporary setback and reaffirmed the office’s unwavering commitment to prosecution, Castro has not yet been formally arraigned in Hawaii, and the Utah arrest warrant remains active while he stays free on the mainland. For the family and friends who waited forty-eight years to see an arrest made, watching the suspect walk out of custody brought a fresh wave of frustration. Yet, the scientific reality remains unchanged: the DNA match is absolute, the physical evidence is real, and the truth of what happened inside McKinley High School in 1977 has finally been brought to light. What unfolds next rests firmly in the hands of the legal system, but the darkness that successfully hid a killer for nearly half a century has officially been shattered forever.