kasey joined his parents at home and being friday night, he and a friend went to see a movimovie,e avengers >> it started at 9:15 and i told my parents everything was fine. >> do you remember the last time you talk to them? >> she handed me a $20 bill. >> it was late. >> then what did you remember? >> i felt like, dad was at the door freaking out and seconds later. >> 911 emergency. the family is about to discover a perfect evening ended in tragedy. when we return a dad devastate, is one tragedy is about to become two. >> ♪ >>> it was 12:30 a.m., now may 5th, 2012. kasey duenas home from a movie and opened the front door, unlocked as usual and moved quietly. if it is not so late, he may have stopped by and conversation with his mom. the house was dark and everyone is asleep. >> kasey went into bed and immediately, he went into a deep sleep and then 25 minutes later. dad's at the door freaking out. going next door to next door, go get jason. go get jason. >> kasey did what he's told, running next door to jason's house. >> his father, mark, besides himself called for an ambulance. >> tell me