A 50-YEAR-OLD prisoner is being quizzed by detectives after a fellow inmate was stabbed to death at Dartmoor jail.Alexander Cusworth was attacked and sustained a knife wound at the prison on Thursday afternoon.He was flown by air ambulance to Plymouth's Derriford hospital where he was pronounced dead following emergency treatment.Detectives, including scenes of crime officers, have been carrying out investigations at the Princetown jail.A 50-year-old man was arrested on suspicion of murder and...
