DETROIT (AP) — Mayor Kwame Kilpatrick spent the night in a one-man jail cell with no TV and a phone only for collect calls, the consequence of violating his bond in a criminal case that has dogged him for months.

His legal problems could get much worse.

State police have wrapped up their investigation of a confrontation between Kilpatrick and a sheriff’s detective who claims he was pushed while recently trying to serve a subpoena on the mayor’s friend.

Michigan Attorney General Mike Cox scheduled a news conference this morning to announce the results. Kilpatrick’s legal team was not optimistic, predicting that some kind of charge was a “done deal.”

“If they want to bring the charges, let’s go. It’s the only way to get it resolved,” defense attorney Jim Parkman said.