Nicole Williams regularly gave illicit drugs to children and at one stage recruited them to commit a failed robbery, which ended in the murder of an "entirely innocent" man.
A psychologist has claimed she was "in an altered state of consciousness" at the time of the unimaginable crimes, and has since experienced "significant weight gain" while in jail.
In 2021, Nicole Williams, 40, placed a "crack pipe" in the mouth of a 12-year-old before sending him, another boy, and a man out to commit a home invasion.
The ultimately botched robbery attempt would end in the murder of Glenn Walewicz, who was shot after the assailants went to the wrong address.
She would then threaten to "bash" a co-offender in efforts to hide the murder weapon, a .22 calibre pump-action rifle.
Psychologist Tabitha Frew told the ACT Supreme Court on Friday, that Nicole Williams was in "an altered state of consciousness" at the time of the crimes.
She told the court during a failed bail application, Nicole Williams had experienced "significant trauma" after being attacked with a machete a month before she organised the home invasion.
Ms Frew said the woman was receiving inadequate medical treatment for Post Traumatic Stress Disorder while in jail, and was on medication which had a side effect of "significant weight gain".
Nicole Williams previously pleaded guilty to attempted aggravated burglary and accessory after the fact to murder.
The bail application
On Friday, defence lawyer Darryl Perkins was required to prove his client had special or exceptional circumstances favouring the granting of bail.
Mr Perkins argued further time in custody would lead to a deterioration of Nicole Williams' mental health.
He also stated she had been accepted into a residential rehabilitation program, but was on a waitlist.
Mr Perkins told Justice Chrissa Loukas-Karlsson that his client's mental health issues were difficult, "particularly for a female person".
Prosecutor Christina Muthurajah argued Nicole Williams, who is set to be sentenced in a month, was only on a waitlist for rehabilitation and the time frame was "questionable".
Ms Muthurajah said the "weight gain" and inaccessibility of other medicine was self-reported, and the psychologist had not made inquiries with the jail's health team.
"There is no evidence that the applicant faces anything different to what the rest of the prison population face," she said.
Justice Loukas-Karlsson found Mr Perkins' argument did not meet the threshold for special or exceptional circumstances and did not grant bail.
Mastermind behind failed home invasion
Agreed facts for Nicole Williams state that in June 2021 she recruited three assailants, including the two children and Gary Taylor, 25, to "do them fullas over".
Her son, Jayden Douglas Williams, has been jailed for his involvement in aiding and abetting the attempted aggravated burglary.
The intended targets of the home invasion were two known drug-dealers, who owed Nicole Williams money.
On the evening of the killing, the recruits met at her Holt home, where she told them to do a "run through" and instructed them to take any money or drugs found at the premises.
Nicole Williams gave a 17-year-old boy a .22 pump-action rifle, which he would ultimately use to shoot Mr Walewicz.
She then placed the "crack pipe" in the mouth of the 12-year-old, telling him "don't worry" and to inhale, before sending him out with Taylor and the other juvenile.
"The offender regularly provided methamphetamine and cannabis to children staying at her premises," the facts state.
Reatile Ncube, then aged 18, drove the trio of would-be home invaders to Phillip, where the 17-year-old would ultimately kill Mr Walewicz, 48, with a single shot to the neck.
After a year of painstaking investigations, Nicole Williams was arrested at Canberra's train station with a one-way ticket to travel interstate.
In May, the 17-year-old shooter was sentenced to 13 years' imprisonment, of which seven years and nine months is to be served in custody.
Charges against the 12-year-old boy were discontinued.
Nicole Williams is set to be sentenced next month.
