A picture of a man who was shot dead by police after he blasted an unarmed officer in the back has been released.
Alistair Bell, 42, was shot dead by a West Yorkshire Police marksman on Tuesday after a night-long stand-off in Kirkheaton, near Huddersfield, during which he fired a number of shots at officers with a handgun.
The 29-year-old officer he shot was protected from more serious injury by body armour he was wearing.
The Independent Police Complaints Commission issued an appeal for anyone who filmed images - perhaps on mobile phones - of the unfolding incident to come forward.
A spokesman for the police watchdog, which released the picture, said: "The IPCC is independently investigating Mr Bell's death and the circumstances surrounding it."
West Yorkshire Police received a 999 call at approximately 6pm on Monday alleging that Mr Bell had made threats towards a woman and her husband.
Police officers responded to this call and visited the woman before travelling to Mr Bell's home to arrest him at approximately 10pm.
It is understood Mr Bell, an unemployed divorcee, produced a weapon and fired at the unarmed officers. One bullet struck the body armour of one of the officers and he sustained bruising to his lower back.
Firearms officers were deployed and trained negotiators moved in, but at 5.30am on Tuesday one firearms officer discharged his Heckler and Koch G36 carbine and Mr Bell sustained fatal injuries. A 9mm self-loading pistol has been recovered from the house.
People living in Kirkheaton have said Mr Bell was a loner who was "well-known to the police". They said he was a drug user with a lengthy prison record.