Local 10 in Miami reports that Duper was arrested in Jacksonville and accused of child abuse. Former Dolphins receiver Mark Duper has been arrested and accused of punching a child, knocking him unconscious and threatening to kill him. After calming down a bit, the fight escalated again, with Duper accused of hitting the child in the head and face with his fist. Messages left on Duper's cellphone by The Associated Press were not returned Thursday. Green and his 18-year-old son had stopped to visit Duper and his son after attending a charity golf outing in Miami earlier in the week. He is accused of twice knocking out his 17-year-old son, in a drawn-out brawl that sounds like Roddy Piper's big fight in They Live. 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.