we're in a defining moment again in american history. now back to "dateline." welcome back. i'm craig melvin. police found a hit note and a photo of garrett in the us trunk of miguel's car. but miguel has h a solid alibi. so investigators kept digging and soon they made a discovery. a clue that indicated garrett was still in danger. here again is josh manning wits. >> fade in, los angeles county, california. garrett warren was gunned down, shot four times in his own home but somehow survived.