Triple murderer Leonard Warwick will die in jail for his "calculated, violent and hateful" crimes motivated by revenge stemming from his Family Court battle more than three decades ago.
The 73-year-old was sentenced to three life terms for slaying a judge, a judge's wife and a church-goer, crimes described by Justice Peter Garling as "an attack on the very foundations of Australian democracy".
The retired firefighter was found guilty in the NSW Supreme Court in July of 20 offences relating to six Sydney events between February 1980 and July 1985.
The so-called Family Court bomber waged a campaign of extreme violence against those he believed acted adversely towards him in his drawn-out dispute with his ex-wife Andrea Blanchard.
His crimes included the shooting murder of Justice David Opas and the bomb-related murders of Pearl Watson, wife of Justice Raymond Watson, and Graham Wykes, who died in an explosion at a Jehovah's Witnesses hall.
Justice Opas was shot when he answered the doorbell just as his family sat down to dinner and Mrs Watson was saying goodbye to her husband when a bomb exploded at their front door.
"The conduct of the offender was calculated, violent and hateful," Justice Garling said on Thursday.'
"It was an evil attack on members of the Australian judiciary, the Family Court and a practitioner."
In a final act of "unspeakable evil", Warwick sought to wreak revenge on innocent members of the Jehovah's Witnesses who were doing nothing more than contemplating features of their faith.
Some congregation members had offered support to his ex-wife, leading Warwick to set off a bomb that killed Mr Wykes and hospitalised 71 people, 13 of whom were severely injured.
"Such flagitious conduct has no place in Australia," the judge said.
Widow Joy Sykes later said she was pleased with the life sentences but lamented the fact that Warwick had 35 years of freedom since her husband's murder.
"That is 35 years my husband didn't have, nothing makes up for that," she said.
Pearl Watson's son, Steve McInnes, said he wanted to thank Justice Garling for showing him "that our justice system really does work".
"Nobody and nothing can bring my mum back but for me the life sentence - hearing the words that he is never to be released is probably the next best thing," he said.
As well as the three murders, Warwick was found to have bombed Justice Richard Gee's home with intent to murder him, bombed the court building at Parramatta and placed a car bomb at the previous home of Ms Blanchard's solicitor.
Justice Garling said each of the offences involved sophisticated planning, preparation and careful conduct, while the three murders involved extreme culpability.
Attacks targeting the Family Court, its judicial officers and their families, and innocent worshippers warranted life sentences without parole.
"It is a hallmark of Australian democracy and the peaceful co-existence which we all enjoy as an enlightened society that there is an independent, strong and dedicated judiciary," he said.
"It is simply unacceptable to expect that those involved in an essential public function in Australia should live their lives in fear of being the subject of such violent attacks.
"Such attacks cannot be tolerated in a free and enlightened society."
He praised the courage of those working in the Family Court at the time, saying they put their public duty, the importance of the litigants and the resolution of their disputes before their own personal safety.
"These men and women were brave, they were courageous and they were unbowed by the offender's vicious and violent attacks," he said.
"Australia owes them a very great debt of gratitude."
The judge noted Warwick's lawyer made no submissions at the sentence hearing, repeating his client's instructions that he was innocent of all charge