(AP) — After finding remains that could be University of Virginia student Hannah Graham, authorities interviewed nearby residents and picked through leaves on the side of a sparsely populated highway, searching for any clues or evidence. Police have said forensic evidence connects Matthew to Harrington's killing, which in turn is linked by DNA to a 2005 sexual assault in northern Virginia. Albemarle County Police Department spokesman Carter Johnson said Sunday no additional information regarding the investigation was available. In surveillance video, she can be seen walking unsteadily and even running at times, past a pub and a service station and then onto a seven-block strip of bars, restaurants and shops. On Sunday, the area was buzzing with people having brunch at outdoor cafes on a brisk, sunny day. Albemarle County resident Bill Gnas, a retiree who lives a few miles from where the remains were found, said helicopters flew overhead Sunday morning and there had been a constant police presence in the area for 24 hours.