in fact come home, and the reason she offered raised more questions for investigators. >> he said, he ripped another pair of pants so he, um, had to come home and just, you know, grab a pair of pants. >> reporter: janet's statements were not helping her husband's cause. david dooley never said anything about ripped pants to police. adding to the confusion, detectives spoke with thermo fisher employee joe siegert, who told them he talked to dooley that morning. >> according to joe, he made a point to come over to him and say, "hey man, i had to go home, because i ripped my pants." >> reporter: dooley was adamant he never said that to siegert and did not rip his pants that day. but the differing stories about why he came home placed a bull's eye squarely on david dooley's back. >> we started working on a search warrant for the residence, and for the truck. >> you execute those search warrants and you find bloody clothing? >> no bloody clothing. >> stuff taken from the crime scene that shouldn't be at his house? >> no. >> some kinda murder weapon?