Trial Lead News Today

Attack on texas cartoon contest. one of the big questions will the twitter trial lead to anything other than the gunman and isis? jonathan hunt is live in texas. jonathan? >> greta, the digital trail leads in several directions right now. but investigators are looking at one in particular. twitter communications between elton simpson the ringleader of the attack here in garland and a man called muhammad hasan originally from minnesota now believed to be in somalia, fighting alongside isis affili...