A planned parole hearing of a convicted killer who shot a planning officer in front of television cameras, has been postponed for a second time.
Mr Collinson (left) was serving a planning order when shot by Dryden
Albert Dryden, now 63, shot Derwentside District Council's chief planning officer Harry Collinson 1991 and also wounded a BBC TV reporter and a police officer.
He was jailed for life for murder and two counts of attempted murder.
A parole hearing planned for September was delayed until December.
But it has now emerged this has been further postponed, this time indefinitely.
Neither the Parole Board nor the Prison Service would comment on the reasons for the second delay.
The shooting took place outside Dryden's front gate in Butsfield, near Consett, on a patch of land on which he had illegally built a bungalow for his mother.
He had been in a protracted dispute with the Derwentside planning authority, and an enforcement order was about to be served.
A digger was on standby to demolish the house when Dryden opened fire with his revolver and shot Mr Collinson dead.
He then fired indiscriminately, seriously injuring TV reporter Tony Belmont, and police officer Stephen Campbell.
Under the terms of his sentence, his earliest release date would be March 2004.
But relatives of Mr Collinson have called for Dryden's not to be released back into the community.
Mr Collinson's elder brother Roy said Dryden should never be released.
He said was "dismayed" at a campaign by the friends of Albert Dryden to secure his release from prison.
He said Dryden was "a dangerous man" who should stay in jail for the full term of his sentence.
Dryden had an unsuccessful parole board two years ago.