A new, in-depth peek inside the minds of notorious serial killing cousins Kenneth Bianchi and Angelo Buono who allegedly impersonated off-duty police officers to lure unsuspecting victims to their deaths before leaving their bodies to be found on the hillsides of East Los Angeles during the 1970s.

Cast:Kenneth Bianchi, Bob Grogan,

Genre:Documentary, Crime,

country:United States of America,

Production:NBC News Studios,