Now, we have the latest on that violent high-risk sex offender, on the run from canadian authorities, slipping across the border into the u.S. Neither country with the authority to arrest him right... See More
Now, we have the latest on that violent high-risk sex offender, on the run from canadian authorities, slipping across the border into the u.S. Neither country with the authority to arrest him right now. Abc's neal karlinsky has that story. Reporter: This morning, canadian authorities say they've lost a violent, high-risk sex offender in the u.S. But they don't have the legal right to come and get him. Specifically, we have no authority to go get him. Reporter:48-year-old michael shawn stanley has been missing a week. Vanishing in western canada, after cutting off his electronic monitoring bracelet. Stanley has a long history of sexual offenses against women and children. He served nine years for assault on an 82-year-old woman in a wheelchair. Later, he was convicted of assaulting two, young boys. After multiple reported sightings last week in canada, east of edmonton, schools were put on lockdown. Just concerned about kids' safety. Reporter: Authorities now say stanley apparently crossed into washington state from vancouver on monday. They had alerted border authorities. But say he somehow slipped through anyway. We had some speculation he may try to cross at some point. So, the fact that he did cross is not a surprise to us. Reporter: Authorities believe they know stanley's location. But police in the u.S. Can't arrest him because they don't have a warrant. Canadian police are hopeful that will soon change. The breach of recognizance here in canada is an arrestable offense. Reporter: The cross-border bureaucracy that's slowed them down, won't stop them from getting a man they called dangerous off the streets, on one side of the border, or the other. For "good morning america," neal karlinsky, abc news, seattle.
This transcript has been automatically generated and may not be 100% accurate.