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Autopsy results for a former Des Moines developer found dead in a burnt out car in Guthrie County last month have been released.

Officials say Bob Knapp died from multiple cuts to his upper and lower extremities that were complicated by smoke and soot inhalation. The manner of death has been ruled a suicide.

Knapp was found in a car that was reported stolen out Waukee.

US Marshals had been seeking Knapp on a probation violation related to federal convictions for improper disposal of asbestos at the Equitable Building. He served 41 months in prison for those convictions.