(A-P) Police say a gun found by a search dog in a wooded area is believed to be weapon used in the fatal ambush shootings of 2 Iowa police officers. Des Moines police spokesman Sgt. Paul Parizek said today (Thursday) that the weapon was found a day earlier “where no person probably could have found it.” He declined to provide further details. Police say the suspect, Scott Greene, turned himself in just hours after the two officers were shot in separate attacks early Wednesday.

Greene is suspected of shooting to death Des Moines Police Sgt. Tony Beminio and Urbandale Police Officer Justin Martin. The men were killed just a few miles and minutes apart as they sat in their police cruisers early Wednesday morning.

Parizek said Greene was expected to be released from the hospital today (Thursday). He says investigators have yet to speak with Greene. Parizek said a motive remains unclear, but that investigators are looking at possible first-degree murder charges. No formal charges have been filed.