-Messenger photo by Bill Shea
Trooper B.J. Miller, a crash reconstructionist with the Iowa State Patrol, explains some of the equipment he uses to investigate wrecks during a Thursday afternoon open house at the patrol’s District 7 headquarters near Coalville. The open house was held to mark the 90th anniversary of the Iowa State Patrol.

-Messenger photo by Bill Shea
An armored vehicle used by the tactical unit of the Iowa State Patrol was on display at the District 7 headquarters near Coalville during the 90th anniversary open house Thursday afternoon.

-Messenger photo by Bill Shea
A mannequin dressed in an old Iowa State Patrol uniform greeted visitors at the 90th anniversary open house held at the District 7 headquarters Thursday afternoon.