it just didn't click with oborn. murphy: questions still swirled around brad in the hours after hannah's body was discovered. but now the case was about to spin off in a whole new direction. investigators had obtained hannah's phone logs and learned she'd made four calls on her last night-- one to a girlfriend, two to brad, and another to a boy named denny ross. denny ross-- does it mean anything to anybody? it doesn't mean anything to me. dennis murphy: the detectives learned that this denny ross lived in a three-bedroom apartment next to a porn shop. they drove over and knocked on the door. denny ross answers the door. he's got a phone in his hand. and i say, hey, i'm detective hughes. i'd like to talk to you about this. and he goes, well, i've got my attorney on the phone. attorney? yes. i said, well, that's-- that's a little different. craig melvin: coming up-- craig melvin: but did that lead to murder? when "dateline" continues. dennis murphy: investigators looking into the murder of hannah hill had followed her