Mr. Monis, who was fatally shot by the police on Tuesday after the 16-hour siege of a restaurant in downtown Sydney, was facing trial on a number of charges, including being an accessory to the murder of his former wife.

He was convicted of harassing the families of Australian soldiers killed in Afghanistan and lost his final appeal in that case on Friday, three days before he went to the restaurant and took the people there hostage. In April, he was charged in the sexual assault of a woman in western Sydney in 2002. Forty more counts of sexual assault involving six other women were later added to that case.

The police on Wednesday raided the southwest Sydney home Mr. Monis shared with his girlfriend, Amirzh Droudis, raising questions over whether she might have played some role in Mr. Monis’s plans.

Ms. Droudis has been charged with stabbing and burning to death Mr. Monis’s former wife last year.

The seriousness of the charges facing Mr. Monis and Ms. Droudis — Mr. Monis’s former wife, Noleen Hayson Pal, was stabbed 18 times and set on fire — has led to questions as to why the two were let out on bail.

Daryl Pearce, the magistrate who granted them bail last December, was reported in the Australian news media at the time to have said that bail was a “simple matter of fairness” and that the prosecution’s case was weak. Mr. Monis argued at the hearing that the Iranian secret service was trying to frame him.