PONTIAC, Mich. — A judge might rule Tuesday whether to keep accused Oxford High School shooter Ethan Crumbley at the Oakland County Jail rather than return him to a juvenile facility, a ruling that would run counter to national trends and a new federal law that took effect in December. Oakland County Circuit Judge Kwame Rowe will consider a request by Crumbley’s court-appointed attorney and court-appointed guardian that the 15-year-old be housed at Children’s Village, a juvenile detention facility in Pontiac designed to provide a “therapeutic environment” for youths. Crumbley was charged as an…