Police have charged a third person over the shooting death of Glenn Walewicz, who was killed while standing on his front door step in Canberra's south a year ago.
Nicole Williams, 38, has been charged with being an accessory after the fact and conspiring to commit aggravated burglary.
Ms William's arrest is the third this week relating to 48-year-old Mr Walewicz's death in June last year outside his Phillip home.
On Monday, an 18-year-old man was charged with murder.
On the weekend, 19-year-old Reatile Ncube was charged with being an accessory after the fact.
Police say they tracked down the suspects by scanning hours of security camera footage from the area.
Officers also tracked phone data and talked to witnesses after the killing.
However, police said they had not yet established a motive for the crime.
Court documents revealed that some of the key evidence came from telephone intercepts of targeted Mr Ncube's phone.
On Tuesday afternoon, Ms Williams did not apply for bail.
All three suspects are behind bars and will be back in court later this month.
