party. his name was ynobe matthews. >> he mentioned that he did attend this party. she was there. >> like many people who had attended, ynobe agreed to an interview, his down at the police department. he was friendly and cooperative. said carolyn had left the party before he had. >> he later left the party. went with another female that was at the party over to a convenience store that was close by and bought some cigarettes. >> ynobe gave the detective a dna sample and supplied the clothes he had been wearing. to verify his alibi, the detective pulled surveillance video from the convenience store, and noticed something. >> the clothing that he was actually wearing was different than what he had just told us. why is he not telling us the truth? >> ynobe claimed he had simply forgotten, and then handed the detective the proper clothing. no forensic evidence found on the clothes connected him to the crime scene. so this wasn't your big moment. >> no, it wasn't. >> the big moment did...