The 48-year-old, who is from Edmonton, has a history of taking children from playgrounds.
He was sentenced in 2006 for assault and unlawful confinement after luring two mentally impaired boys to an Edmonton apartment. One boy was 13, and one was nine.
In the late 1980s, he spent nine years in prison for the aggravated sexual assault of an 82-year-old Lethbridge woman who was confined to a wheelchair.
A manhunt was launched Oct. 1 after Stanley left Edmonton where he was serving a peace bond that required him to stay close to the city and stay away from children, among other conditions.
Police were made aware of Stanley's flight via his electronic monitoring bracelet, which he cut off in Lloydminster on the Alberta-Saskatchewan boundary.
Schools in Kindersley, Sask., and area were lockdown after he was spotted in the area. His SUV was later found in Lethbridge, Alta.
Stanley located in Seattle
An arrest warrant was issued for Stanley on charges of breach of recognizance, mischief and driving offences.
However, the Alberta government said that while Stanley has a criminal record of violent offences, the charges he is currently wanted for are not severe enough to justify asking American authorities to turn him over.
Stanley entered the U.S. through a border crossing in B.C. six days after leading authorities on a multi-province search.
Police have maintained that without a request for Stanley's extradition, or evidence he has committed a crime in the U.S., he cannot be arrested.
However, acting deputy chief Jack Williams of the U.S. Marshals in Seattle told CBC News Thursday that an arrest warrant for Stanley will be issued if he fails to register as a sex offender in Washington state by next Tuesday.
Williams said there has been a lot of public pressure to locate Stanley, which police in Seattle did on Thursday. Williams said Stanley was co-operative and agreed to register as a sex offender.
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