A sex offender who authorities say slipped onto a St. Paul school bus carrying kindergartners and walked out of jail days later has been re-arrested at a Savage hotel.

Michael Charles Friedrichs, 61, was booked into Scott County jail Wednesday for allegedly violating the terms of his predatory offender registration.

While Friedrichs was registering himself as homeless out of Minneapolis, he had not contacted his probation officer or local law enforcement to inform them he had actually been living in a Savage hotel for weeks, according to a criminal complaint filed this week.

Police were originally called to the hotel, a Quality Inn at 4601 state Highway 13 West, Tuesday on a report of possible child pornography on a hotel computer. Police found no evidence of pornography, but after interviewing Friedrich discovered his status as an offender instead.

Friedrichs told police had been living at the hotel since Jan. 10. He said he had been living at a shelter in Minneapolis, but didn’t like it and moved out.

Friedrichs was charged Thursday with the registration crime, a felony punishable by up to five years in prison.

Last week, Friedrichs was arrested by St. Paul police after being found on a school bus that had been transporting Chelsea Heights Elementary School students home from a field trip to the Walker Art Center. There were other adults on the bus, and school officials said no students had been harmed. Video footage showed Friedrichs pried open the doors to board the bus in Minneapolis when the driver wasn’t on it.

He was arrested on suspicion of a registration violation, but released three days later. Minneapolis police are in charge of the investigation. Related Articles Two men face felony charges in Bloomington home invasion

Police: Teen has life-threatening injuries after being shot in face in St. Paul

Investigators call on driver in fatal Maplewood hit-and-run to come forward

Former St. Thomas student pleads guilty to hoax bomb threat

Minneapolis teen charged in shooting death of campaign worker

In 1996, Friedrichs was found sitting on an unoccupied school bus in a Rosemount bus storage lot and then, in 2004, a bus driver found Friedrichs on an unoccupied school bus parked at the Minnesota Zoo, according to Apple Valley police. When police investigated, Friedrichs told them he masturbated on unoccupied school buses in the past, police said in 2011.

In 2004, he was convicted of sexually assaulting the 15-year-old son of a woman he once dated.

He was released from prison in April and had completed his supervised release.