mark porter. >> yes. >> mark edward porter.n! >> but selling a lot of coins did not prove that marc porter was guilty of murder. remember, mark also had an interest in the queen business. >> the best explanation for that was just simply that these four coins that marc porter had, it was just a coincidence that they happen to be sold the day after the terral was killed. >> still, the police, ibm executive retired school superintendent, and by all appearances, a pillar of the community who is now the prime suspect in the murders of jan and gary terrell. >> i never liked the guy. i didn't trust him. i thought he was something about fake. >> gary's father, larry, always had a bad feeling about mark. , and he was convinced if mark was the killer, the motive was money. >> well, i thought that he was befriending, recruiting and grooming my brother so he could gain access to his money. , and i think over a period of time, he saw jan as an obstacle. >> when jessica heard detectives were looking at mark, she wasn't surprised. >> he didn'