It's gone from bad to worse for USC. ABC 7 in Los Angeles has reported that Mark Sanchez, the likely successor to Matt Leinart as USC's quarterback, has been arrested by the LAPD on suspicion of sexual assault of a female student. Update: Associated Press also is reporting Sanchez's arrest. "The alleged assault occurred earlier today," officer Jason Lee told AP. Sanchez was taken into custody just north of campus around 4 p.m.