How the shooting of Curtis Cheng unfolded

THE SHOOTING OF POLICE ACCOUNTANT CURTIS CHENG:

OCTOBER 2014

Talal Alameddine is banned from owning guns.

JULY 2015

Merrylands Constable Chantelle Hannah notices a "very obvious change" in Alameddine's appearance and demeanour. Earlier that year he'd been "charming" but was now expressionless and wearing traditional Islamic dress with a bushy beard and shaggy hair. He smirks as he says "my beard is for ISIS" quietly to the constable.

SEPTEMBER 2015

Alameddine makes attempts to obtain a firearm. His efforts become more intense and display an urgency.

OCTOBER 1, 2015

Raban Alou drives to Guildford to pick up another person before visiting Alameddine's Merrylands home, making five urgent attempts to call him. Alou later exchanges coded messages with another person referring to a "Gucci bag" and going "fishing". The other party urges him to delete the messages.

OCTOBER 2, 2015

Farhad Jabar enters Parramatta Mosque carrying a Nike backpack in the morning. Alou travels to Alameddine's house before heading to the mosque to sit with Jabar. Alameddine contacts Alou from a public phone and arranges to meet in Jones Park.

1.35pm to 3pm - Alameddine and Alou meet at different locations including Jones Park, Warwick Road in Merrylands and Merrylands Oval and spend about 13 minutes together in total. It's during this period Alou was handed a loaded .38 calibre Smith & Wesson revolver.

3.05pm - Alou arrives at the mosque and meets with Farhad to pray. Alou leaves the mosque, walks to his vehicle and returns with the revolver, hiding it under his robe.

3.58pm - Alou and Farhad are recorded entering the female-only prayer hall. Farhad wears his Nike backpack. They are alone for seven minutes during which time the gun changes hands again.

4.06pm - As Farhad leaves the mosque, he looks up at a CCTV camera and gives the Islamic State salute.

4.24pm - Farhad paces back and forth outside the NSW Police Headquarters approaching several people before turning away.

4.30pm - Curtis Cheng walks out of the building. Farhad approaches from behind and shoots him in the back of the head. He strides back and forth before stopping to yell "Allahu Akhbar". Farhad is shot dead in an exchange of gunfire with police.

8.56pm - Alou hears a radio station broadcast a statement of Police Commissioner Andrew Scipione. His wife Zeinab Perger says "good" and "job's done then" as Alou hums in the background.

OCTOBER 7, 2015

Alameddine and Alou are arrested in dawn raids.

OCTOBER 2017

Alameddine pleads guilty to recklessly possessing a thing connected with a terrorist act.

MARCH 2018

Alou is sentenced to 44 years in prison with a non-parole period of 33 years for aiding, abetting, counselling or procuring a terrorist act.

MAY 2018

Alameddine is sentenced to a maximum 17 years and eight months in jail with a non-parole period of 13-and-a-half years.