THE Clarendon police are investigating a case of robbery with aggravation that took place yesterday in the community of Rocky Point in the parish.Police reported that about 3:00 am, a 46-year old fisherman of Rocky Point, Clarendon, was held up and robbed at his home of $4 million and two cellular phones by three men purporting to be police. The men, police said, then escaped in a white Toyota Probox motor car.