PORTLAND, OR — Kyron Horman’s disappearance in 2010 remains one of Oregon’s most haunting unsolved cases, and his family is still searching for answers more than 16 years later. The 7-year-old vanished after arriving at Skyline Elementary School in Portland for a science fair, where he had brought his red-eyed tree frog project.
A new Freeform docuseries, Somebody Knows Something, is revisiting the case, with the sixth episode, Lost at the Science Fair, set to premiere Sept. 7 at 10 p.m. ET/PT. The episode features Kara Robinson Chamberlain, a kidnapping survivor, true crime creator and former law enforcement officer, as she examines the unanswered questions that continue to surround Kyron’s case.
The last known moments at Skyline Elementary
Kyron was not usually driven to school. On June 4, 2010, his stepmother, Terri Horman, took him to Skyline Elementary because the science fair meant he needed a ride for his project. After he set up his display, the last known photo of him was taken, showing a smiling second grader standing proudly beside his work.
That image has become one of the most recognizable parts of the case. It captures the final confirmed moment before the boy disappeared from school grounds, and it remains central to how investigators and family members have reconstructed the morning. School staff later realized he was missing, setting off an enormous response.
A search effort that became Oregon’s largest criminal investigation
Multnomah County Sheriff’s Office Chief Deputy Lance Hemsworth said the first alert came from a Skyline Elementary employee who noticed Kyron was gone. From there, the case grew into the largest criminal and search operation in Oregon history.
Authorities initially had limited information, and family members said they were pressed for details quickly. Kaine Horman, Kyron’s father, said investigators asked the parents to take polygraph tests. He said he had no trouble doing so and believed others who took them would pass as well. Terri Horman failed one polygraph, he said, and later failed another.
Questions around Terri Horman and the family timeline
Terri Horman told investigators and later ABC News’ Nightline that she last saw Kyron walking down the hallway toward his classroom before she left the school. Carson Lopez, a childhood friend who was also 7 at the time, said Terri approached him and told Kyron she needed to take him to a doctor’s appointment right away.
Kaine Horman said he did not know about any appointment that day. He also acknowledged that life at home was strained at times, though he said Terri’s possible involvement never occurred to him at first. His view changed, he said, after the second failed polygraph. Terri Horman has never been formally named a suspect and has repeatedly denied wrongdoing.
Desiree Young kept pushing for cooperation and answers
Kyron’s mother, Desiree Young, was living in Medford, about four hours from Portland, when her son disappeared. She said Kyron had been shy but funny with people he trusted, and she remembered how excited he was about the science fair the night before he went missing.
Young said the school called to tell her Kyron was missing, and she immediately headed for Portland. She later filed a civil suit as an investigative tool after Terri Horman hired a lawyer and stopped cooperating with authorities. That case eventually fell apart after a friend of Terri’s invoked the Fifth Amendment 147 times during questioning about the day Kyron vanished.
Public suspicion, legal claims and Terri Horman’s denials
Public attention stayed fixed on Terri Horman even after the civil case unraveled in 2013. In 2016, she told Nightline she had nothing to do with Kyron’s disappearance and said it hurt to be asked. She also said hearing issues and exhaustion affected her polygraph results, and she denied ever asking anyone to kill Kaine Horman.
Weeks after Kyron disappeared, court papers from Kaine Horman’s divorce proceedings included allegations that Terri tried to hire someone to kill him and may have been involved in Kyron’s disappearance. Those claims were never proven in court, and Terri has maintained her innocence. Through her attorney, she declined to comment further.
Police still believe someone may know what happened
Hemsworth said investigators believe someone in the community knows what happened on June 4, 2010, and he urged that person to come forward. He said doing so could bring some measure of peace to a family that has carried the burden for years.
As of May 2026, police had digitized the Horman case files and were using artificial intelligence to review both old and new leads. For Desiree Young, the wait has never eased. She said every time the phone rings, she still hopes it is Kyron, and she described the anniversary as something her family continues to live through each day.
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