Anthony Wilkinson, one of the men co-accused with Dale Cregan of the murder of David Short dramatically changed his plea today.
He pleaded guilty to the murder of David Short, 46, in a gun and grenade attack in Manchester.
Wilkinson, 33, from Beswick, also admitted possessing a firearm.
He denies attempting to murder Sharon Hark and causing an explosion with a hand grenade.
Three other men, including Dale Cregan, deny murdering Mr Short.
Dale Cregan, 29, of no fixed abode, is being tried on two counts of murder. One is of the murder of Mark Short, 23, at The Cotton Tree Pub on May 26 last year. The second is his father David Short, 46, at his Folkestone Road East home on August 10.
He also faces four counts of attempted murder and causing an explosion by using a hand-grenade.
Leon Atkinson, 35, from Ashton-under-Lyne, Damian Gorman, 37, from Glossop,
Ryan Hadfield, 28, from Droylsden, Matthew James, 33, from Clayton, Luke Livesey, 27, from Hattersley, are also charged with murdering Mark Short, and three counts of attempted murder of John Collins, Ryan Pridding and Michael Belcher, who were also in The Cotton Tree at the time. All deny the charges.
Francis Dixon, 37, from Stalybridge and Jermaine Ward, 24, are also charged of murdering David Short. They are also charged with Cregan with one count of attempted murder of Sharon Hark in Droylsden later on the same day. They deny the charges
They are also accused of causing an explosion with a hand-grenade. All deny the charge.
Mohammed Ali, 23, is charged with assisting an offender. He denies the charge.
Cregan has already pleaded guilty to the murder of police officers PC Nicola Hughes, 23, from Saddleworth, and PC Fiona Bone, 32, from Sale, in Hattersley on September 18 last year.