A man was charged Sunday with killing Milwaukee Officer Matthew Rittner during a drug raid on his home, reports the Associated Press.

Jordan P. Fricke, 26, told investigators he didn't realize it was police trying to break down his door, authorities said. He is charged with first-degree intentional homicide and other crimes in the fatal shooting of 35-year-old Officer Rittner, who was part of a tactical unit trying to serve a warrant to search the home for illegal drugs and weapons Wednesday morning.

A $1 million cash bond was set Sunday for Fricke, who remained in jail. A court commissioner found probable cause to hold Fricke for further proceedings, and a preliminary hearing was set for Thursday.