Former Dolphins receiver Mark Duper has been arrested and accused of punching a child, knocking him unconscious and threatening to kill him.

Local 10 in Miami reports that Duper was arrested in Jacksonville and accused of child abuse.

According to the arrest form, Duper punched a child and knocked him unconscious and threatened to kill the child. According to News 4 in Jacksonville, the victim was a teenager, and another man came to his aid and pulled Duper off him. The victim was able to leave the house where the incident took place, and the Department of Children and Families was called in to investigate.

A member of the Dolphins’ Ring of Honor, Duper was selected to three Pro Bowls in the 1980s. He is one of the thousands of former players currently suing the NFL over concussions.