Brajkovic spent close to a decade behind bars, along with five others, for allegedly planning to blow up targets across Sydney.
More than 40 years later, a judicial inquiry is probing the convictions of the so-called Croatian Six, including whether police fabricated evidence and extracted false confessions.
The other members of the group are Maksimilian Bebic, Mile Nekic, Anton Zvirotic and brothers Ilija and Joseph Kokotovic.
All of the men denied making confessions that police sought to attribute to them and four, including Brajkovic, claimed to have been severely beaten by police.
Joseph Stipic, who was originally charged along with the Croatian Six, also appeared at the inquiry on Tuesday.
Stipic was cleared of his charges after it was determined a detonator could not have been found inside a desk drawer at his home, as police claimed, because there was no desk in his room.
Acting Justice Robert Allan Hulme, who is heading the inquiry, said it is "beyond dispute" police at the time had a culture of fabricating evidence.
"I see this topic as relatively free of controversy amongst us in 2023," he said.
"It might have been a controversy in 1980."
During Brajkovic's arrest at his home in Sydney's Bossley Park, police claimed to have found a bag containing explosives and detonators that they presented at his committal hearing.
"It's not my bag. I don't recognise it by anything," Brajkovic told the inquiry.
He also said a transcript of a supposed interview between himself and police was a "complete fabrication".
"It was like tying up the hands of the men who were arrested behind their backs and then telling them to go off and fight the trial," he said.
In ordering the inquiry, NSW Supreme Court judge Robertson Wright said there was "a doubt, or at least a question" over police evidence of confessions and the finding of explosives.
"The explosives said to have been found in a drawer in Mr Stipic's desk in his room, when there was no such desk ... caused me to have a doubt or question concerning the veracity and reliability of the evidence about the explosives found at the premises of five of the six men," he said.
An inquiry will examine the actions of disgraced NSW cop Roger Rogerson in the "Croatian Six" case. (Joel Carrett/AAP PHOTOS)
The inquiry will examine the actions of police, including those of disgraced officer Roger Rogerson, who helped lead the arrests of the men.
Rogerson, who is serving a life sentence for murder, could be called to answer questions about his involvement in the case.
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