The girlfriend of Sydney siege gunman Man Haron Monis has been found guilty of murdering his ex-wife.
Amirah Droudis stabbed the unnamed woman 18 times, doused her body in petrol and set her alight in April, 2013.
Droudis had pleaded not guilty.
Police alleged Monis was the mastermind behind the killing, having "brainwashed" Droudis into carrying it out.
According to Justice Peter Johnson of the NSW Supreme Court, Droudis "adopted uncritically Monis' view of the world with its extreme and perverse features".
"Monis took advantage of the accused's willingness to act at his behest."
Droudis met Monis in 2003, and later converted to Islam and changed her name from Anastasia to Amirah. She appeared in a number of videos online praising the 2002 Bali bombings, the 9/11 attacks of 2001 and the Holocaust.
Droudis' defence team argued Monis had hired a professional killer or a "bikie" to carry out the brutal murder, but Justice Johnson said witness descriptions of a "frenzied" attack by a woman dressed in a hijab ruled those theories out.
"I'm satisfied that the only rational inference arising from the evidence is that it was the accused who carried out the murder," he told the court.
Droudis reportedly showed no emotion as the verdict was delivered.
A friend of the victim outside court told media Monis, who was killed during the December 2014 siege at the Lindt Chocolate Café, had "gotten away with murder".
Two others died during the 17-hour ordeal - Tori Johnson and Katrina Dawson. Mr Johnson was killed by Monis, while Ms Dawson died after being hit by a police bullet when they raided the central city shop.