you know what i mean? >> jean also said she called the fire department from a phone in the house. but investigators found the outside door was locked. if jean locked it on her way out, police saw this as evidence she was in no hurry to save her husband. >> her husband was on fire, burning in this building. she runs outside, but she locks the door behind her. see, to me, that's very important. you think the jury's going to buy this? i can tell you right now, they won't. >> major overbey asked jean to take a polygraph test, and she agreed. >> she was asked point-blank if she poured her husband with gasoline, set him on fire. she failed that question. she failed if she was present when he was murdered. >> investigators discovered that jim was angry with his wife for spending so much time in kansas each year visiting relatives. there were also rumors that jim may have been planning to leave jean. major overbey believes on the night of the fire, the couple may have been discussing a divorce, which prompted an argument. >> it's our theory that there's a domestic situation between mr. long and his wife. i believe that the abrasion on her chin came from him possibly slapping her. and his skull fractures, i believe, was a result of her striking him in the head with some hard object. >> overbey believes jean poured an accelerant on jim, set him on fire, then, inadvertently carried the fuel can out of the workshop when >> i an explosion in that workshop,