>> brian norlander. >> and who was he? to us. >> reporter: brian was a high school junior, honors student, football player and a close of friend of tara's. never been in trouble before? >> never been in trouble. never been in trouble before. >> reporter: yet somehow, brian was mixed up in a drug deal. text messages told police he'd sold tara the tabs for ten dollars each. so, you need to find brian right away? >> we need to find brian. >> reporter: it was saturday afternoon, just hours after tara died, and her friends were gathered at her home. >> i remember walking in and seeing mai on the couch and hearing her scream. and the atmosphere was just tense and everyone was absolutely heartbroken. >> reporter: two of tara's friends knew that brian sold her the drug and texted him to meet, but they didn't know police were looking for him, too. >> he lived by tara. so me and erin walked and he drove, and we met up with him on the street and just went into his car to tell him what had happened. >> so you guys are walking from up t