investigator eric burroughs hurried back to nome, ♪ ♪ ♪ ♪ ♪ ♪ >> reporter: investigator eric burrows gave him one big advantage. nome it's a small town, sometimes it seems that everyone dose every. wind take officer brian -- he was friends with sonya's family, also the first to uncover evidence that a police officer might have been involved in her murder. cheering on one second trial, -- chatting with a neighbor and the neighbor told him something potentially explosive about matt owens. >> he asked, did it ever come up at trial that charlotte -- salma sonya's i.d. in matt's bedroom? it was one of those jaw moments. >> reporter: -- had rented a room, after his wife split. burrows believed that charlotte was talking about the same gym card found in police car 3 to 1 it. could tie a wins to the murder, and the subsequent cover-up. if true, that could be huge for the prosecution. that is, if the judge will allow it into evidence. >> reporter: i mean it is third- party hearsay right? >> yes. >> reporter: burrows had to trace the new information back to its source. he first spoke to office