What happened

What happened
The shooting took place at 2:19 a.m. today on Federal Plaza West, near the Home Savings and Loan Building and across from Edward W. Powers Auditorium.
Police Chief Bob Bush said the officer made a traffic stop, and called for a license plate check. Bush said the check didn't come back "hot," meaning it wasn't stolen. Hartzell was shot inside the cruiser, police said.
He said the stop wasn't connected to any pursuit.
He noted that police had good witnesses to the shooting.
Police impounded a two-toned Lincoln Continental, believed to be the car the murder suspect was using. It had been abandoned a few blocks from the shooting scene at Rayen and Belmont avenues. Koliser owns the Lincoln.
Earlier suspect
About 7:30 a.m., police surrounded two apartments at 30 and 38 Shields Road in Boardman. They were believed to be the apartments of a different suspect and a girlfriend. Police evacuated apartment dwellers nearby while awaiting warrants to search the two apartments. Police later learned that the suspect was already in jail on another case.
Earlier, Bush said police were looking for a car linked to a shooting earlier today at the Casaloma Gardens, 2843 Mahoning Ave.
Units from the following departments were involved in the search: Ohio Highway Patrol, Mahoning County Sheriff's, Mill Creek MetroParks, Lowellville, Struthers, Poland Township, Austintown and Youngstown State University. At least one officer from the Sharon, Pa., Police Department was helping in the search.