GAINESVILLE, Fla. (AP) — An elderly man told police he robbed a bank to pay his wife's medical bills.

His wife was behind the wheel of a getaway car Tuesday when the 71-year-old man ran from the bank, police said. Her doctor's appointment was scheduled a half hour later.

A dye pack exploded inside the bag of money, covering James Roland Clark as he left the bank. Clark and his wife, Deloris Jane Clark, 66, were arrested soon afterward, said police Sgt. Keith Kameg.

Clark told police he threatened bank tellers saying he had a bomb, but it was actually a bag of sand, Kameg said.

The Alachua County Sheriff's Office Bomb Team detonated the bag of sand as a precaution.