with doting grandfather jack jessie at the helm, his big and blended california family seemed like one happy bunch. then, jack was found stabbed to death in his living room and police wondered if the jessies weren't as close as they seemed. the case went unsolved for years until an ace detective hatched an unconventional plan to catch jack's killers. here's keith morrison. >> the game is called 80 mouse track," the little ball on its trap which unless every lever works in unison, will not be caught. how often things go wrong to allow thes my to get away. so odd that what really happened could so thoroughly mimic a children's game. >> how nice! >> these are the people that it happened to in orange county, california. they vacationed together. >> i'm tired and ready to go home. >> shared birthdays. >> this one is for bev. >> happy birthday! >> even got together information a monthly game of pins. what these grainy home videos don't show is what is yet to come, murder, conspiracy, one branch of the family against the other, a game so twisted,s my so clever crafting a trap to catch the plo