Greene allegedly "ambushed" Sergeant Anthony Beminio of the Des Moines police department and Officer Justin Martin, who worked in the upscale suburb of Urbandale, early on Monday morning.
Des Moines Police say over 15 and under 30 rounds were fired. The complaint said he threatened to kill another man during a confrontation in the vehicle park and yelled a racial slur used against blacks.
Urbandale Police Chief Ross McCarty said on Wednesday that most of his officers were familiar with Greene, who lived in the town. The officers were fatally shot in the two Iowa cities about 20 minutes apart; the first shooting was in Urbandale, the second was in nearby Des Moines.
Urbandale Police Chief Ross McCarty said that in the first shooting, investigators believe the shooter walked up to the officer's auto and shot without warning.
Within hours police were on the hunt for 46-year-old Scott Greene, the prime suspect, who was considered armed and unsafe. He was arrested about 35 miles from the shootings after he flagged a state employee and asked the employee to call 911.
Police say they had been to Green's home in Urbandale for prior incidents, none this serious. The man suspected in the shootings turned himself in to a conservation officer in Dallas County about 9:30 a.m. November 2.
A couple days later, cops responded to a complaint that Greene had threatened to kill a person at his apartment complex; he pleaded guilty to harassment. "The judge suspended his jail sentence to time served and was then placed on 1 year probation". He said a motive for the shootings remains unclear. We all know each other. Court records show he has another daughter who is an adult, and the Iowa National Guard confirmed Thursday that his 26-year-old son is a member. A memorial fund has been established for each officer at the Des Moines Police Officers Credit Union.
Greene posted a cellphone video online last week indicating he was sacked after reporting unsafe driving.
A Missouri man armed with two rifles and a pistol and wearing a ski mask ambushed and killed three officers near a gas station and convenience store in Baton Rouge, Louisiana. Police told the newspaper the arrest was peaceful.
Police said Greene had a court appearance just Tuesday, over some type of a dispute between he and his mother. Iowa Gov. Terry Branstad called the killings Wednesday, "an attack on the public safety of all Iowans".
Beminio, a 2001 Simpson College graduate, was an all-state lineman and state champion heavyweight wrestler at West High School in Iowa City, according to the school's athletic director, Craig Huegel.