Cassandra Marie Jeanette Corum, 21, was found dead July 14, 1996, in Livingston County, Illinois. Her body was discovered floating in the Vermilion River, nude and with a gunshot wound to the head. Duct tape had been placed over her mouth, indicating she had been restrained prior to death. She was known as Cassie and had prior arrests for robbery, public intoxication, and possession.

The killing was later linked to Andrew Urdiales. Ballistic testing connected his firearm to the shot that killed Corum and to two other women in Cook County, Illinois. Urdiales provided detailed confessions and investigators tied his actions to a series of murders across multiple states. A Livingston County grand jury indicted Urdiales on four counts of first-degree murder in March 1998; the prosecution sought the death penalty.

Anyone with information about Cassandra, where she spent time in Illinois, or who knew her activities in 1996 is asked to come forward.