Robin Ann Kerry was 19 when she disappeared from the Chain of Rocks Bridge in St. Louis, Missouri, in the early hours of April 5, 1991. She had gone to the abandoned bridge with her 20-year-old sister Julie and their 19-year-old cousin Thomas Cummins to show him a poem they had painted. That night a group of four men — Marlin Gray, Reginald Clemons, Antonio Richardson, and Daniel Winfrey — confronted them. What began as a robbery escalated into sexual assault, then the three victims were forced through a manhole to a concrete pier beneath the bridge’s metal platform.

Cummins jumped and survived; Julie’s body was recovered three weeks later. Robin’s body was never found. The case was later prosecuted: Winfrey, a juvenile at the time, pleaded guilty and testified; Gray was convicted and executed in 2005; Richardson’s death sentence was commuted to life; Clemons’s conviction was overturned in 2015 and he later pleaded guilty to second-degree murder, rape, and robbery, receiving five consecutive life sentences. DNA evidence and Cummins’s testimony were central to the prosecutions.

Does anyone who was in the Chain of Rocks Bridge area on April 5, 1991, or who knew Robin, Julie, or Thomas have information that could help clarify what happened to Robin Kerry?