without hearing more but you provided no link. As well, your question is in regard to spousal abduction but the case here seems to involve child abduction by a parent. The two are not at all similar.
"is arrested in Arizona. Canadian Press
CHANDLER, Ariz. - A British Columbia boy who was abducted more than six years ago has been found in Arizona and will soon be reunited with his father.
"Valor Howell was believed to have been taken by his mother, Jamie Howell, in December 2004, when he was just three years old. The pair were found in Chandler, Ariz., on Sunday when someone called the police about a disturbance in a laundry mat. Jamie Howell was arrested for disorderly conduct and when police checked for possible warrants they found that she was wanted in Canada for parental kidnapping.
"Chandler Police Det. David Ramer says the boy is in good condition and his department is working to have him reunited with his father as soon as possible. Ramer says the allegation against his mother is not an extraditable offence in the United States, so RCMP plan to go to court in an attempt to have the woman sent back to Canada."
I wonder how members of SE would respond if spousal abduction wasn't an extraditable offence from Canada to the US. (and it may not be, I'm not a legal authority). It seems quite peculiar.