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298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP5274) and 11 other sources
In the summer of 1990, fifteen-year-old Robert Thomas Pillsen-Rahier, known to his loved ones as Robb or Bobby, was a resident at the Cheyenne Mesa residential treatment facility in Colorado Springs, Colorado. He had been admitted to the facility for emotional and behavioral issues that stemmed from the trauma of witnessing his stepfather's suicide at the age of seven. On the morning of July 6, 1990, Robert made a distressing phone call to his mother. During this monitored conversation, he hinted that something was wrong but was unable to elaborate. Alarmed, his mother immediately contacted the facility to arrange a visit, only to be told that Robert was scheduled for an off-campus outing and she could not see him until he returned. Later that same day, the facility informed her that Robert had run away. He has not been seen or heard from since that day.

The circumstances surrounding Robert's disappearance are clouded with uncertainty. There is conflicting information about what he was wearing at the time he went missing. His mother was initially told he was in a blue plaid shirt and black jeans, but these items were later returned to her with his other belongings. She also received both pairs of shoes he had taken to the facility, suggesting he may have left barefoot, which was unusual for him as he had sensitive feet. A week prior to his disappearance, during a home visit, his mother discovered blood on his underwear, leading her to believe he may have been a victim of sexual abuse at the treatment facility. She suspects this may have been what he was trying to tell her during their final, monitored phone call.

At the time of his disappearance, Robert was described as a white male, 5'9' tall, and weighing 180 pounds, with brown hair and brown eyes. He had several distinguishing marks, including a small scar in the middle of his forehead, scars on the last two toes of his right foot, and discolored skin on his right arm and the top of his right hand from childhood burns. He also wore glasses with silver frames and tinted lenses. Robert had no prior history of running away, and his family believes it would be highly uncharacteristic of him to not make contact. The Cheyenne Mesa treatment facility has since closed due to financial issues. Despite the passage of time, Robert's case remains an unsolved and troubling mystery, leaving his loved ones with unanswered questions about the fate of the young boy who vanished after a cryptic phone call.

Last Seen: Jul 6, 1990

Possible Unidentified Matches (3)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

81%Moderate
John Doe — Denver, Colorado - unidentified case UP7173
John Doe — Denver, Colorado
UP7173 • Found Jan 8, 1997
View case
Sex ✓Male
Age 100%Est. 20–25 vs 15 when missing
Race 100%White
Location 85%63 mi away, same state
TimingFound 7 years after last seen
Height 84%5'7" vs 5'9"
Weight 98%160 lb vs 180 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
77%Possible
John Doe — Glendale, Colorado - unidentified case UP11476
John Doe — Glendale, Colorado
UP11476 • Found Feb 10, 1998
View case
Sex ✓Male
Age 72%Est. 25–30 vs 15 when missing
Race 100%White
Location 86%60 mi away, same state
TimingFound 8 years after last seen
Height 100%5'8" vs 5'9"
Weight 100%196 lb vs 180 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
76%Possible
John Doe — Fort Collins, Colorado - unidentified case UP454
John Doe — Fort Collins, Colorado
UP454 • Found Jul 12, 1997
View case
Sex ✓Male
Age 100%Est. 18–30 vs 15 when missing
Race 100%White
Location 71%122 mi away, same state
TimingFound 7 years after last seen
Height 84%5'11" vs 5'9"
Weight 98%160 lb vs 180 lb
Hair 100%Brown vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

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