Des Moines police say Greene is a suspect in the shootings early Wednesday in Des Moines and the suburb of Urbandale. DES MOINES, Iowa (AP) — Two Des Moines area police officers were shot to death while sitting in their patrol cars early Wednesday in what authorities described as separate ambush-style attacks, and police said they are searching for a known suspect. Paul Parizek said Wednesday that authorities are developing suspect information but there was nothing that authorities were ready to share with the public. It was unclear what provoked Wednesday's attacks, Des Moines police department spokesman Paul Parizek told a news conference prior to Greene's arrest, adding that "we may never know." Tearful embrace as Des Moines area mourns again

The shootings bring renewed pain to a community that recently mourned the deaths of two other Des Moines police officers. Before the shootings in Iowa, 50 police officers had died by gunfire, two accidentally, in the line of duty in the United States this year, according to the Officer Down Memorial Page website. Wednesday marked the first time a Des Moines police officer has been shot and killed on duty since 1977, when two died in separate incidents months apart, according to the Iowa Department of Public Safety. 'These guys were ... doing nothing wrong'

Police discovered Martin's body about 1:05 a.m., after residents reported shots being fired. Authorities from several agencies saturated the area after that shooting, and about 20 minutes later discovered that a Des Moines officer who had responded to the initial killing had been shot in a patrol car at an intersection, Des Moines Sgt.
Two police officers are shot and killed in separate "ambush-style" attacks in Urbandale and Des Moines, Iowa. A suspect in both shootings was identified and was captured by police two hours later.