HOUSTON - Houston police and U.S. Postal Inspectors worked together on a case involving numerous luxury cars being purchased with stolen identities. Police said the case began with a tip about a single car purchase that seemed "irregular." Police said five men used other people's identities to rack up hundreds of thousands of dollars in car purchases. Police said the men bought Porsches, Audis, Land Rovers, BMWs and a Chevy Camaro. "Most of the dealerships didn't know they had been a victim yet, before we were calling them saying, 'Hey, there's a problem with this deal, you might want to...