Career
All four victims died between January 2003 and August 2004, while Kimball was on "supervised release" after a prior check fraud conviction, serving as an Federal Bureau of Investigation informant. Marcum remains missing and is presumed dead, while the other three bodies were recovered in remote Colorado and Utah locations. Kimball has boasted to friends of multiple other murders, but authorities have uncovered no direct evidence corroborating his claims.
In September 2010, it was reported that the Federal Bureau of Investigation was investigating Kimball as a possible suspect in the murder and mutilation of a woman found in Westminster, Colorado, in October 2004, while Kimball lived in the area under Federal Bureau of Investigation supervision.
He denied involvement. Kimball is currently serving his sentence at the Sterling Correctional Facility.