04/19/2011 09:20 am ET Updated Dec 06, 2017

Holly Bobo Missing: Search Intensifies For Missing Tennessee Nursing Student

The governor of Tennessee has tripled the reward for information leading to a suspect in the disappearance of nursing student Holly Bobo.

The 20-year-old student has been missing since April 13. She was heading to class at the Tennessee Technology Center when she disappeared. According to CNN, her brother Clint witnessed "a man in camouflage leading her from their Darden home into the woods." Clint Bobo told authorities that he initially thought the man was his sister's boyfriend.

The investigation has turned up more than 250 leads, but as of yet no suspect.

ABC has more on the search:

Gov. Bill Haslam approved a $50,000 reward from the state, in addition to a $25,000 reward already offered by Bobo's community.

Investigators believe Bobo's abductor lives in or near the 20-year-old college student's town of Parsons, Tenn., and have asked her neighbors to report any unusual activity or a break in peoples' routine those noticed in recent days.

Bobo's cousin, country music star Whitney Duncan, took to Twitter to clear Bobo's brother, Clint, as a suspect.

"My cousin Clint, Holly's brother, is NOT a suspect & I'm sick of people saying that he is," she wrote Monday. "He has been cleared for good reason. Shut up."

Hundreds of volunteers continue to search rural Decatur country for any semblance of a clue in the young student's disappearance.

WATCH: ABC News report: