Knoxville — The maximum reward to catch a Tennessee bank robber whose holdups date to at least 2009 is now $15,000, the FBI announced Monday.

Authorities have dubbed the man the "Too Tall Bandit". He's described as being white, about 40 years old, 6 feet 3 inches to 6 feet 6 inches and 210 to 250 pounds. He may have brown eyes, speaks with a deep voice and walks with a limp or pronounced gait that affects his right leg.

He typically covers his face or uses a Halloween mask to disguise his looks.

The FBI Knoxville's Safe Streets Task Force.thinks his robbery string dates back nearly 10 years - to the Volunteer State Bank holdup in November 2009 in White House, Tenn.

The same man is thought to have held up banks -- and one pharmacy in Farragut -- in the Knoxville area.

Several robberies linked to him occurred from 2009-12 in Middle Tennessee. He then shifted to East Tennessee, according to the FBI.

Read more from WBIR's website.