gary's brother, larry tyrell. >> he constantly collected d sold trinkets. >> and did well at it? >> gary was a good businessman.he gold and silver went into one of the five saves in fe s safes were in the house.d indian jewelry, quality pieces that he loved. >> what was his favorite piece?lrus tusks. he loved those. >> they were rare, each worth around $10,000. >> how would he find these >> i'm not really sure. they did go to flea markets and garage sales and things like that. any time i would ask him, you know, where did you get this, he oh, in my travels. one of the family when he and jessica got engaged.rs the walrus tusks as well as all the other unusual items in the tyrell home. >> there was so much stuff in , yet it was immaculate. it was like an off beat museum. >> jessica and jason lived way in oklahoma city. but jessica spoke with or texted her parents several times a day. but that all changed on may 1st.my mom on my way to work, like i always do. and she didn't answer. so i thought, well, maybe she's hroom, maybe she's outside. and i called back and i still did not reac

tyrell. >> i never did like the guy. i didn't trust him. i thought he was something of a fake. >> gary's brother larry always had a bad feeling about mark. and he was convinced if mark was the killer, the motive was money. grooming my brother so he could gain access to his money. i think over a period of time he saw jan as an obstacle. >> when jessica learned detectives were looking at mark, she wasn't surprised. >> she didn't show up at the funeral. >> conspicuous by his absence? >> it was pretty obvious at that point that there was something going on. >> his former secretary said she hated working for mark porter. ended up quitting her job to get away from him. >> he's off in some way, he could be a psychopath or something. >> you used that word? >> i did. >> but what bothered police was his lack of cooperation. >> he wouldn't give dna. he wouldn't take a polygraph. >> add to that the suspicious pawn shop transaction, and the story about stopping by the tyrell house the night of the murders. couple of phone calls to mark and she couldn't get ahold of him, didn't know where she was or what he was doing. >> but police still needed physic