A man in Washington Parish was arrested Thursday in the aggravated rape of a developmentally disabled person, authorities said.Eddie McBeth, 60, was arrested on a charge of aggravated rape and being a convicted felon in possession of a firearm.According to the Washington Parish Sheriff's Office, investigators received a report of a sexual assault on a developmentally disabled person. Authorities determined the incident did occur and McBeth was taken into custody.McBeth was taken to the Washington Parish Jail. He is being held on a $350,000 bond.