A Presque Isle man faces up to 20 years in prison for engaging in online child sexual abuse. Joseph Ebner, 32, pleaded guilty Friday at U.S. District Court in Bangor to distributing and possessing child sexual abuse material. Ebner shared videos with an undercover agent, who was posing as the father of a 9-year-old girl, and told the agent he wanted to have sexual contact with the girl, according to court records. Investigators from the FBI, Pen…