WEST PALM Seashore — Five decades just after police located an elderly Highland widow stabbed to dying in her bedroom, someone near to her has absent to jail — but not for the murder. David Del Rio, 39, little by little emptied the bank accounts of Betty and Billy Cabral all through his tenure as their self-appointed “monetary adviser,” stealing thousands and thousands to invest on household improvements, cruise tickets, automobiles and $50,000 worthy of of firearms and silencers for himself and his household, detectives stated. The Lee County man’s crimes arrived to mild over the class of an investigation into Betty Cabral’s murder, which stays open. It can be…