MEMPHIS, Tenn. (AP) — A sheriff says dense woods where the remains of Holly Bobo were discovered by two hunters had been searched without success by air and ground crews when the student vanished three years ago.

The Tennessee Bureau of Investigation on Monday confirmed that the skull that was found was that of Bobo, a nursing student who was 20 when she disappeared in 2011. Her brother told police he saw a man dressed in camouflage leading her into the woods and she hadn’t been seen since.

Bobo’s abduction gained national attention and the family received strong support from the town of about 2,400 people located about 110 miles east of Memphis. Hopes that Bobo would be found alive were dashed in March when Zachary Adams, whose family has property near where Bobo’s remains were found, was charged with murder and kidnapping.

Another man, Jason Autry, faces the same charges. Both men have pleaded not guilty.

Copyright 2014 The Associated Press.