A high-risk sex-offender who fled home confinement in Canada on Oct. 1 is a U.S. citizen with a lengthy criminal history who has entered the U.S. legally, according to state and federal law-enforcement officials.

While Canadian authorities reportedly have said they have leads on the whereabouts of Michael Sean Stanley, 48, U.S. law-enforcement agencies can’t follow, stop or arrest him without cause or a warrant, said Jack Williams, the acting chief deputy of the U.S. Marshals Service in Seattle.

Williams said one of his deputies is working with counterparts in Canada and the U.S. Department of Justice to determine whether the charges Stanley is wanted on in Canada have a matching statute in the U.S. under which a provision warrant could be issued.

If and when that occurs, Williams said his agency would track Stanley down and serve it.

Unlimited Digital Access. $1 for 4 weeks.

“But right now, there’s no warrant and we do not know where Mr. Stanley is,” Williams said. “We have plenty of people who do have warrants that we’re looking for.”

Stanley has a long history of sexual offenses against women and children in Canada and has been missing since Oct. 1, when he cut off an electronic-monitoring bracelet while in the area of the Alberta-Saskatchewan boundary, according to Canadian authorities.

Last week, the Royal Canadian Mounted Police locked down schools in several west-central Saskatchewan communities after receiving multiple, unconfirmed sightings of the Edmonton, Alberta, man.

Stanley is wanted in Canada on charges of breach of recognizance and mischief and driving offenses. He was released from jail in April 2011 after completing a 32-month sentence for assault and forcible confinement.

Washington court records indicate Stanley has a long criminal history and has been named in cases in Okanogan, Chelan, Grant, Lincoln, Clark and King counties.

He served more than three years in prison after a 1984 burglary conviction with a deadly-weapon enhancement involving a knife, according to court records.

Williams said Stanley is a U.S. citizen who presented himself at the U.S. border crossing at Blaine and was allowed to enter the country.

U.S. Customs and Border Protection Agent Jade Matzel, who said she was the public-information officer, declined to discuss the matter and referred inquiries to the office in Seattle. The spokesman there was on furlough due to the government shutdown.

Patrycia Thenu, a spokeswoman for the Edmonton Police Service in Canada, told The Associated Press that she couldn’t comment on what should or should not have happened at the border. She said authorities are now looking into the extradition process and working with other agencies in Canadian government on that effort.

Stanley was being monitored by Edmonton police under a peace bond, with which authorities can impose conditions on an individual in the community. His peace bond has 20 conditions, including one ordering him to stay away from children.

Thenu said authorities have leads on Stanley’s location, but she declined to discuss those, saying detectives don’t want him to further evade police.

Seattle Times news researcher Miyoko Wolf contributed to this story, which includes information from The Associated Press.

Mike Carter: mcarter@seattletimes.com or 206-464-3706