Serial killer Scott Kimball has been arrested for investigation of solicitation to commit first-degree murder and attempted escape.

An arrest warrant was filed Tuesday by the FBI against Kimball, who is being held in Sterling Correctional Facility.

Kimball, 51, allegedly plotted the escape and murder between May 6 and Sept. 22 while he was incarcerated in Sterling, according to Logan County District Court documents.

Kimball, an FBI informant-turned-serial-killer, is serving a 70-year sentence for four murders committed after he was released from federal prison in December 2002 to act as an FBI informant. He’s also serving 48 years for fraud and 70 months on a federal gun charge.

Read full story at The Denver Post.

Scott Kimball is brought in to the courtroom for the start of his hearing at the Boulder County Justice Center in Boulder Thursday, Oct. 8, 2009. Kimball was charged in the death of his uncle, Terry Kimball, and three others — Jennifer Marcum, LeAnn Emry and Kaysi McLeod. (Mark Leffingwell, AP Photo)