Florida police arrest bank robber armed with knife and walker

arrest (generic)
Posted at 10:27 AM, May 09, 2014
and last updated 2014-05-09 10:27:00-04

BOYNTON BEACH, Fla. (CNN) -- Florida police arrested a bank robber, who was armed with a knife... and a walker.

Investigators say surveillance video shows Russell Cooper, 78, in a Palm Beach County bank. They say he threatened a bank employee with a small knife and demanded cash.

Police, meanwhile, were waiting for him outside after the robbery.

Authorities say officers used a stun gun on cooper when he refused to drop the knife.

He was arrested and charged with armed bank robbery, and kidnapping.