Josh Powell

The lead police agency in the investigation of missing Utah mom Susan Powell has said for the first time that investigators believe Josh Powell played a role in killing his wife.

Newly released documents from the West Valley City Police Department show Susan Powell had a tumultuous relationship with her husband, Josh Powell.

Newly released police files say Josh Powell had an affair with a Utah woman just months before his wife disappeared.

According to a West Valley City police detective's report, investigators contacted the woman, whose full name is redacted, in August 2010, after her phone number was discovered in connection with the case.