discovered? reporter: there was a video that was taken or put on youtube. it was an interrogation of two guys who confessed to taking part in killing the guys. and that video was uploaded on the internet and about the same time, the guys appeared dead, very close to where the mass grave was with a sign saying the guys that killed are buried right here. greta: who did it? i mean, what was the motive? reporter: the two guys on the video interrogation said that it was the on the orders of la bardi, edgar valdez, a texas-born gangster who was arrested here in mexico, august 30. greta: there is another story i have heard in the last 24 hours about the attorney general of one of the states in mexico. he has been found murdered.