Spanish police have officially ended their search for the missing teenager Jay Slater after he went missing more than two weeks ago. The search for the missing 19-year-old included sniffer dogs, helicopters and an army of search crews on the ground. However, in a dramatic conclusion to the mystery that has gripped the British public, a spokesperson for the Guardia Civil said today that the search was over. “The search operation has now finished although the case remains open,” a spokeswoman for the service said. Jay Slater flew to the Spanish island for the NRG music festival before heading to…