C. case, everyone speculated that he had sniper training and that he was a police officer.

CNN: L.A. manhunt reminiscent of D.C. sniper case

He had training as a sniper and was an expert in poisons, the ministry said.

CNN: Spain 'al Qaeda cell' may have targeted Gibraltar

The sniper had been serving his sentence at the Military Corrective Training Centre in Colchester, Essex, prior to his release last year.

BBC: Sgt Danny Nightingale