NEWARK - A reward is being offered for information leading to the arrest of a man accused of raping a woman in Newark in April.Investigators say the suspect claimed to be a police officer in order to lure his victim into Branch Brook Park, where he then sexually assaulted her.The rapist is described as a man in his 30s, 6 feet tall and weighing about 225 pounds. He has short black hair and sports a thin goatee.