what about all the other victims here that can't speak to shirlee or thomas or roger or mary.ng to solve this murder, we were going to set a trap for three people, and i wasn't sure it was going to work or not. it had to be perfect. the world. right up until the night he was murdered. >> there was evidence of a violent struggle between jack and his killer. >> someone was keeping secrets, and police thought they knew who. >> her tone was just scary. >> they thought they knew the motive, too. but -- >> matter of proving it is a different story. >> until someone found the perfect ba

what about all the other victims here that can't speak to shirlee or thomas or roger or mary. ry >>> trying to solve this murder, we were going to set a trap for three people, and i wasn't sure it was going to work or not. it had to be perfect. the world. right up until the night he was murdered. >> there was evidence of a violent struggle between jack and his killer. >> someone was keeping secrets, and police thought they knew who. >> her tone was just scary. >> they thought they knew the motive, too. but -- >> matter of proving it is a different story. >> until someone found the perfect bait. en >> hey, dude, it's me. you need to [ bleep ] call me asap. de >> could they set the perfect trap? >> these people might literally get away with murder. >> "deadly conspiracy." hello and welcome to "dateline y extra." i'm craig melvin. with doting grandfather jack jessee at the helm his big and blended california family seemed like one happy bunch. then jack was found stabbed to p death in his living room and police wondered if the jessees weren't as close as they seemede the case wen