A York County inmate is facing even more time behind bars after he sucker punched his attorney in court.

Authorities said Lamarcus Williamson had just been sentenced to 15 years in prison in a plea deal when he turned and hit his public defender with his handcuffed fists.

"I was shocked, I didn't see it coming. I hit the floor," said attorney Dan Hall.

Hall said it was only the second time he had worked with Williamson, who was pleading to robbery, drug and assault charges, as he was just filling in for a colleague.

"Court is a tense, emotional, tough situation," Hall said.

Court officials said they noticed Williamson fidgeting in the moments before he punched Hall.

The court constable immediately grabbed Williamson and rushed him out the door.

Hall was not seriously injured, telling Eyewitness News he suffered a few loose teeth and a sore jaw.

"I'm not a good boxer," he said, smiling.

The York County Sheriff's Office charged Williamson with contempt of court, which could add an extra six months onto his 15-year prison sentence.