Independent Queensland MP Peter Wellington has decided not to release new information about an infamous Brisbane nightclub fire that killed 15 people.

Mr Wellington says he has new information that would acquit the men who were jailed for the firebombing of the Whiskey Au Go Go nightclub in Fortitude Valley in 1973.

He says the information warrants a new judicial inquiry or court case and wants Queensland Attorney-General Jarrod Bleijie to investigate.

But Mr Wellington now says his role on the Parliamentary Crime and Misconduct Committee prevents him from tabling the information in Parliament.

"In light of information that has now come to my attention as a result of my membership of this, and in light of possible action this committee may take as a result of this ongoing investigation, I am no longer able to refer to this new information as intended in this chamber," he said.

John Stuart and James Finch were sentenced to life in prison after being found guilty of the murder of one of the 15 victims.

Stuart was found dead in his cell at Brisbane's Boggo Road jail in 1979.

Finch was paroled in 1988 after almost 15 years in prison and was deported to England.