Authorities near Des Moines, Iowa say they have captured Scott Michael Greene — the man they believe is responsible for the ambush-style killings of two officers early Wednesday morning. Both were killed while sitting in their patrol cars. The motive of Greene, 46, is not yet known. KCCI-TV Reporter Kim St. Onge has more from near the scene of the arrest:…

St. Onge says they saw several emergency vehicles:…