FBI Informant Scott Kimball Pleaded to Four Murders

Scott Kimball, 58, a convicted serial killer and former FBI informant, pleaded guilty in 2009 to four murders committed in 2003–2004 and was sentenced to 70 years in federal prison in Colorado; investigators believe he likely had additional victims. Former FBI agent Jonny Grusing says Kimball manipulated the bureau for years, treating his crimes like a “game” and deliberately feeding investigators partial information. Kimball used long‑standing fraud tactics—blaming crimes on others and fabricating tips—to win confidential informant status, which he then used to obtain lower‑security placement and eventual release. He recruited and framed his cellmate, Steve Ennis, by concocting a murder‑for‑hire plot, then reported Ennis to the FBI while simultaneously targeting Ennis’s girlfriend, Jennifer Marcum, a principal victim.