Kimberly Billy was 19 when she went missing in 1984 and was later identified among victims of the pair known as the Speed Freak Killers, Wesley Shermantine and Loren Herzog. Decades after her disappearance, remains recovered from an abandoned well near Linden, California, were forensically reassembled from hundreds of bone fragments; investigators identified multiple individuals from that material, including Billy.

Shermantine provided hand-drawn maps while on death row that led authorities to burial sites, and those maps helped locate the well where Billy and other victims were found. Shermantine and Herzog, childhood friends from Linden whose crimes were linked to heavy methamphetamine use and violent behavior, were convicted of multiple murders. Herzog died by suicide in 2012 after learning Shermantine was revealing locations of victims; Shermantine received a death sentence.

Many investigators believe additional remains may still be hidden at the well or other locations associated with the killers. If anyone knew Kimberly, saw her in 1984, or has information about her disappearance, please share what is known.