The Night Hannah Hill Disappeared, Part 2

>>> hannah hill was buried in a family plot in kentucky a day after what would have been her 19th birthday. for her friends back in akron, caine road , the quiet, residential street where her car had been found became a place to honor her all-too-brief life.

>> we put ribbons around nearby trees in remembrance.

>> the heat was on to find her killer. the akron police department was already facing intense scrutiny for taking a full week to find hannah 's car. there it sat abandoned in the night on caine road where just hours after hannah first disappeared residents began calling police to come take a look.

>> at least five neighbors called police. we have a car on our neighborhood that's totally unexplained and you need to come out here.

>> ed meyer is a reporter for "the akron beacon journal ." he said neighbors saw car keys on the dashboard and hannah 's name written in two places. in a black eye to the department that lingers to this day, police came and ticketed the car and failed to make the connection.

>> how could this car have sat there since wednesday and not be connected with this?

>> well, i think that's -- entirely possible for a car to be parked for many days anywhere in the city.

>> did somebody drop the ball here, captain?

>> well, again, that's under investigation.

>> was the investigation compromised horribly because of that delay? the condition of the body and forensic results?

>> very possible. it gave time for whoever did this to cover his tracks.

>> who did do it? in the week after hannah vanished all of the while her body in the trunk of her car undetected the police were trying to make sense of her boyfriend, brad oborn. when detectives checked him out with hannah 's family they got an earful.

>> mr. hill was never a fan of brad oborn.

>> they knew very well who he was.

>> he didn't like him and mr. hill made no bones about it.

>> i tried to put her away from matt oborn, but you know when kids get something in their head the more you try the further they get away from you.

>> hannah 's friends saw things they didn't like about brad, too.

>> i told her she could do better and he wasn't good for her.

>> and when they met him police were struck by brad's demeanor.

>> before hannah 's car was found police officer washington lacy was pulling weekend duty when again into the station walked a fuming teenager demanding to know what was being done to find his missing girlfriend.

>> first impression was, like, he was -- he just was abrasive. brad's attitude wasn't the only thing to catch the officer's eye.

>> right away, i noticed some scratches on him and you kind of raise your eyebrows at that.

>> sergeant hughes was on duty that weekend, too. he made note of the angry boyfriend with the scratches.

>> he's got physical injuries and he's coming out like a house of fire.

>> either he's completely innocent and concerned about his girlfriend and really loved her or he'd done something and was using us as a tool.

>> could have fallen either way.

>> the detective said brad was visibly upset and told him he'd been a bad boyfriend, jealous, controlling.

>> we found out that he was a drug dealer and that he liked to chase other girls.

>> you know, it takes you pretty closely into means of opportunity country.

>> hughes had tough questions for boyfriend brad.

>> take off your shirt. we want full fingerprints and palm print, you know?

>> is he saying, wait, slow down. i need to talk to a lawyer.

>> no. absolutely not. never once said anything about an attorney, his rights, just find my girlfriend. whatever you need, find my girlfriend.

>> and then came the awful day they discovered hannah 's body.

>> now we're hammering, if not you, who? basically?

>> you think he's good for this crime.

>> not sure, but i want more information. give me something to go on.

>> to detectives brad was a puzzle. angry and abrasive on one hand and yet cooperative and seemingly distraught about hannah 's death in the other.

>> it just didn't click.

>> questions still swirled around brad in the hours after hannah 's body was discovered and 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.

>> the detectives learned denny ross lived to a three-bedroom apartment next to a porn shop. they drove over and knocked on the door.

>> denny ross answers the door and he's got a phone in his hand, and i say, i'm detective hughes . i'd like to talk to you about this, and he says i have my attorney on the phone.

>> attorney?

>> well, that's a little different.

>>> coming up, was there an each more surprising admission from denny ross still to come about a visit from hannah the very night she died.

>> her and i were conner have say thing, you know, pretty much we kissed and stuff.

>> but did that lead to murder? when "dateline" continues. [