The girlfriend of Sydney siege gunman Man Haron Monis has been found guilty of murdering his ex-wife.

Amirah Droudis stood trial at the New South Wales Supreme Court for the murder of her late partner’s ex-wife at a unit in Werrington in April 2013.

The victim, who cannot be named for legal reasons, was stabbed 18 times before being doused in petrol and set alight.

Justice Peter Johnson said that he was satisfied that Monis had planned the murder, and Droudis had carried it out, adding that if Monis had not died in the Lindt Cafe Siege in December 2014 that he would be “sitting next to the accused in the dock.”

“This was no cold blooded murder,” he told the court. “This was a hot blooded and frenzied murder by an enraged female attacker.” 

He said that Droudis was “enthralled by” Monis and “greatly influenced” by his extreme political and religious views, and that Monis in turn “took advantage” of her.

He also said that she’d carried out the murder at his bidding during the “closest and most intense level” of their relationship.

Photo: Twitter / Nick Ralston.