pistorius's agent was called soon after the shooting. this is the first time he's told the story. >> one phone call to me, 4:00 in the morning. everything changed. yeah. >> what was your reaction? who phoned you and what did they say? >> they said that -- manager's daughter phoned me from oscar's phone. i picked up the phone and tau of auto -- saw it was oscar's number. thought he was phoning. and i heard the voice shouting, please, you have to come to oscar's house. trying to make sense of what's wrong. no, no, you -- someone's shot. someone's shot. >> coming up, was it murder or a tragic mistake? [ male announcer ] it's intuitive and customizable, just like a tablet. so easy to use, it won a best of ces award from cnet. and it comes inside this beautifully crafted carrying case. introducing the all-new 2014 chevrolet impala with the available mylink system. ♪