SAN FRANCISCO (AP) — Police say they are looking for a group of "cowards" who beat a homeless man to death as he slept in an alley in downtown San Francisco. Police spokesman Albie Esparza said Wednesday that Tai Lam's body was found inside a sleeping bag. Esparza tells KGO-TV (http://abc7ne.ws/1pp3Z8Y ) that the 67-year-old man was "savagely" beaten by three suspects early Monday.