A report has found that nine undercover British soldiers were at the scene of a sectarian killing in County Armagh 22 years ago.
Three republicans were ambushed on March 7, 1990 when they left an RUC station in Lurgan. Sam Marshall was killed in the loyalist gun attack.
The PSNI's Historical Enquiries Team found that although the killers launched the attack within yards of armed British army troops, there was no evidence of state collusion.
However, the Marshall family has hit out at the findings - which did not re-interview the soldiers but relied on RUC statements from the time - and said it has only served to raise further questions.
John Marshall, a brother of the 31-year-old murder victim, said: "the gunmen meant to kill the three men that night, and it went wrong. The other two guys lived to tell the tale."
Sam Marshall, who was a Sinn Féin member at the time, was sentenced to seven years for arson as a teenager and took part in IRA protests
for political status while he was held in the H-Blocks.
One of those who escaped the murder bid that night was Colin Duffy, who earlier this year was cleared of the murder of two British soldiers at Massereene Barracks in Antrim in 2009.
The killers' two guns were never recovered, but were linked through ballistic tests to three other murders and an attempted murder.
The gunmen have never been identified.
