Authorities have charged an Iowa man with two counts of first-degree murder in the ambush shooting deaths of two police officers. The Des Moines Police Department said that 46-year-old Scott Michael Greene was put under arrest Thursday afternoon after being questioned by detectives.

The department says that Greene was put into the handcuffs that had belonged to the officers who were killed, Sgt. Anthony Beminio and Urbandale officer Justin Martin. Greene is expected to be transported to the county jail. He faces life in prison if convicted. Greene was arrested after being released from the hospital and questioned by investigators.

Beminio, 38, and Martin, 24, were shot after 1 a.m. Wednesday while sitting in their patrol cars in separate incidents less than 2 miles apart. Police say they have recovered a rifle that was believed to be used in the shootings.