Two “untouchable” drug dealers are beginning lengthy jail terms after undercover police officers infiltrated the messaging service they were secretly using. Sign up to the daily Crime UK newsletter. Advertisement Hide AdAdvertisement Hide AdFollowing a further deep dive into the messages, Durham Police officers were able to arrest Mitchell and Cairns on suspicion of conspiracy to supply class A drugs. Drug dealers David Cairns and Gary Mitchell are beginning a combined 40 years behind bars. Advertisement Hide AdAdvertisement Hide AdCairns 47, of Salters Lane, Shotton Colliery, was jailed for 22 years while Mitchell, 48 of George Street, Haswell, was locked up for 18 years.