Accused Family Court bomber Leonard John Warwick will stand trial on 32 charges including four counts of murder, after a court heard blood found at the scene of a 1985 church bombing is 100-billion times more likely than not to be his.

It is alleged Warwick targeted the Family Court, members of the judiciary and the public during a series of shootings and bombings from 1980 to 1985.

Family Court judge David Opas was shot outside his home, another judge was injured by a bomb at his home, and another bomb killed Pearl Watson, the wife of Judge Ray Watson.

Another victim, Stephen Blanchard, was shot and Jehovah's Witness minister Graham Wykes was killed by a bomb at a church hall.

Local Court Magistrate Robert Williams ordered Warwick to stand trial after hearing blood found at the scene of a fatal Jehovah's Witness church bombing was 100-billion times more likely to have come from the 69-year-old than from another Australian male.

The crimes allegedly committed by Warwick include:

the fatal shooting of his brother-in-law, Stephen Blanchard, in 1980

the fatal shooting of his brother-in-law, Stephen Blanchard, in 1980 the fatal shooting of judge David Opas in 1980

the fatal shooting of judge David Opas in 1980 the bombing of the home of judge Richard Gee in 1984

the bombing of the home of judge Richard Gee in 1984 the bombing of the Parramatta Family Court in 1984

the bombing of the Parramatta Family Court in 1984 the bombing of the home of Judge Ray Watson, killing his wife Pearle, in 1984

the bombing of the home of Judge Ray Watson, killing his wife Pearle, in 1984 the bombing of a Jehovah's Witness church hall, killing Graham Wykes and injuring other churchgoers, in 1985.

Magistrate Williams noted the same explosive material and detonation source was used in several bombings.

He also found the Crown case indicated Warwick had knowledge of, and access to, firearms and explosives, including Australian army training between 1967 to 1969.

"It can be accepted from statement of a former [Army] employee that the accused would have received basic training of explosives, boobytraps and mines," Magistrate Williams said.

"On the basis of the whole of this evidence there is a general link of knowledge of explosives ... that can be referred to Mr Warwick."

The remains of the Jehovah's Witness church hall following the 1985 bombing. ( ABC News )

Outside court, family members of alleged victim Graham Wykes welcomed the news the case will proceed to trial.

Mr Wykes' wife Joy and daughter had travelled to Sydney to see today's judgement at Central Local Court.

Joy Wykes was smiling through tears as she left.

"As you can see by our smiles, we're feeling good. Thankyou," she said.

Warwick will next face court to be arraigned on February 10.