Wixom police Sgt. Ronald Moore told a judge that bullet fragments recovered from vehicles — in tires, an engine grill, the passenger side — matched Casteel's 9mm handgun. Shell casings from the same gun also were recovered near the windshield wiper of his Chevy Malibu, Moore said.
Drivers "heard gunshots and described a dark car traveling southbound as they drove north," Moore said.
Casteel didn't talk about the charges, and the pleas were entered on his behalf, a typical custom at arraignments. He looked impatient at times over the video feed from jail and glanced at the ceiling.
"Let's waive the reading," Casteel said firmly, telling the judge to skip a formal recitation of the charges.
Casteel and his wife returned to Michigan, their native state, last summer after living in Taylorsville, Ky. Police there said they had no contact with him until June when he became agitated and complained about planes flying too low over his house.
Officers were stumped because there were no other reports of low-flying planes, Chief Toby Lewis said.
Ed White in Detroit contributed to this story.