The violent, videotaped arrest of a suspect by Philadelphia police has sparked several investigations. Margaret Warner leads a discussion about the use of force by police.
Controversy erupts over a racially motivated murder .
A report on Texas prison gangs and racial violence. The videotape was broadcast over and over again. Aerial news footage taken Wednesday of Philadelphia police officers kicking and beating a black car-jacking suspect as he lay on the ground. Jones crashed the car and fled on foot, with several officer pursuing him. Police caught up with him, and in the melee that followed, both Jones and an officer were shot, and another officer bitten.