Curtis Cheng's widow speaks of loss

The widow of murdered police accountant Curtis Cheng has again spoken of her loss, as another man charged in relation to his death faces a Sydney court.

A woman holds an order of service for Curtis Cheng after his funeral service at St Mary's Cathedral, Sydney. Source: AAP

The widow of police accountant Curtis Cheng has again spoken in court of the loss of her "dearest one", this time in front of a second man involved in supplying the gun later used in his terror-inspired killing.

Selina Cheng gave her victim impact statement on Friday at the NSW Supreme Court sentence hearing of Talal Alameddine, 25, a day after his co-offender Raban Alou was jailed in the same court for at least 33 years.

With her daughter Zilvia by her side, Ms Cheng said she was "utterly repulsed" by those who played any role in the murder of her gentle, humble and beloved husband.

She recalled the night of October 2, 2015, when four police officers arrived on her doorstep to tell her Mr Cheng had died.

"I felt total darkness completely envelope me. I was completely devastated, and all sense of security and hope was lost," she said.

A day earlier, Ms Cheng sat in the same courtroom with her son Alpha as Alou, who'd just been jailed for a total of 44 years, made an Islamic State one-finger salute to the public gallery and said "this is the beginning".

Alameddine supplied Alou with the gun given to 15-year-old Farhad Jabar, who fatally shot Mr Cheng as he left work at Parramatta Police Headquarters.

Jabar - also known as Farhad Mohammad - was swiftly killed in an exchange of gunfire with police.

The court on Friday heard there was some issue as to whether Alameddine shared Alou and Jabar's radical views when he supplied Alou with the Smith & Wesson .38 revolver.

The 25-year-old has pleaded guilty to recklessly possessing a thing connected with a terrorist act and supplying a pistol.

The Crown is arguing Alameddine provided the weapon for free, and the judge could draw an inference he did so because he shared Alou's radical beliefs.

But defence barrister Bret Walker SC said the evidence didn't prove whether there was or wasn't payment for the gun.

He said it wasn't likely a person supplying a gun wanted to know or be told what it would be used for.

Alameddine, who smiled and waved to supporters in the public gallery as he was led into the dock, is scheduled to face court again when the hearing continues on April 27.