NEW YORK (AP) — The New York Police Department's practice of stopping, questioning and frisking people on the street is facing a sweeping legal challenge this week.

A federal trial is scheduled to begin Monday in Manhattan. A judge could order major changes to the nation's largest police force.

Lawyers say the trial will include stories from a dozen black and Hispanic men who say they were targeted because of their race. The suit seeks a court-appointed monitor to oversee changes to how the police make stops.

The lawsuit is the second — and broader — legal challenge to the policy to be heard in federal court this year by U.S. District Court Judge Shira Scheindlin. She has said in earlier rulings that she is deeply concerned about the tactic.