The Davenport Police Department played host to the 85th annual Iowa State Police Association Conference and Purple Heart Banquet this week.

Davenport Police Sgt. Eric Gruenhagen, president of the Davenport Police Association, said the three-day conference, held Monday, Tuesday and Wednesday at the Radisson Quad-City Plaza in Davenport, was attended by police officers from Iowa.

During the Purple Heart Banquet held Wednesday, five Iowa law enforcement officers, four of whom lost their lives, were honored with Purple Hearts.

West Des Moines police officer Shawn Miller was struck by a car and killed Aug. 3, 2016, as he was returning from testifying in a court hearing in Dallas County. The crash occurred at the intersection of U.S. 169 and Interstate 80 when the driver of a car failed to yield and Miller’s motorcycle collided with the passenger side of the car.

Urbandale police officer Justin Martin and Des Moines police Sgt. Anthony “Tony” Beminio, were killed Nov. 2 in separate ambush-style shootings about 20 minutes apart. Scott Michael Greene, 47, of Urbandale, pleaded guilty to two counts of first-degree murder during hearing in Polk County District Court in May. Greene was sentenced to life in prison and is serving his sentencing at the Iowa State Penitentiary in Fort Madison.

Pottawattamie County Sheriff’s Deputy Mark Burbridge was killed and Sheriff’s Deputy Pat Morgan was wounded May 1 when they were shot as they were returning two inmates to the Pottawattamie County Jail in Council Bluffs after a court hearing.

Wesley Williams Correa-Carmenaty, 24, one of the inmates, used a concealed key to remove his shackles. He then was able to get a firearm from the prisoner transport van and shoot both deputies.

Correa-Carmenaty stole the van and fled from the jail. He attempted to carjack a citizen and shot him. He abducted another person and forced her to drive him from the scene in her vehicle. He pleaded guilty to first-degree murder and was sentenced to life in prison without parole plus 50 years.

Gruenhagen said this year’s training focused on post-traumatic stress disorder and post-incident stress and trauma in law enforcement.