. >> reporter: and his broken glasses had been found in the bedroom, along with birkenstock sandals, one inside the room, one by the door. >> he was adamant they were not his sandals. >> yes. >> he never wore them. >> he actually says, "i've never seen them before." >> but what did science find? >> his dna was on 'em. so, why would he lie about those shoes? and the reason he'd lie is 'cause the shoes show he's in the room. >> reporter: bill kyne took the stand to tell his horror story about that day. and he put his personal stamp on those birkenstocks. >> diane and i bought them for him at sam's club about a year or so prior to this incident. >> reporter: bill recalled the time when kevin tried to pick a fight with him, then called 911. testimony the defense fought to keep out but lost. >> i wanted the jury to know that he was like a boy who cried wolf who would make 911 calls frequently. >> reporter: bill said kevin was hardest on his mother, especially in the summer of 2010 when she gave him the deadline to move out, and he cursed her out in front of the whole family. >> "that's it