Two men have died in one week from the police use of these lethal weapons which deliver a 50,000V shock. More from the Telegraph.
Philip Hulmes, 53, was hit with electric probes from the stun gun after barricading himself in his house in Over Hulton, near Bolton.
It is understood police were called to the house by a concerned family member at 8.30pm last night.
They were told Mr Hulmes, who was armed with a knife, had locked himself in the house, was making threats and had started to stab himself. Officers arrived and smashed a hole in the door.
When they spotted Mr Hulmes and his injuries they called for Taser-trained back up.
After further attempts to talk him out of the building failed they broke into the house and used the stun gun.
Mr Hulmes was taken to the Royal Bolton Hospital where he died about half an hour later. Investigations by the Professional Standards Branch and the Independent Police Complaints Commission were due to be launched this morning.
No post mortem has yet been carried out.
Last week the police watchdog launched an investigation after Dale Burns, 27, died after being tasered by police.
Mr Burns, who was also sprayed with pepper spray during the attempted arrest and was taken to hospital but was later pronounced dead.
The Independent Police Complaints Commission (IPCC) said an investigation had begun into the incident, with officials examining police logs and taking accounts from officers.