A violent teen who "wreaked a spate of misery on many people" and "ground her teeth" into a police officer during an unmitigated crime spree will spend her early adult life in prison.

Lily Pritchard-Davis, 18, appeared at the Auckland District Court this afternoon to face 28 separate charges during her splurge across Auckland from August last year to March, much of which occured while on bail.

The teen, described as "young, immature, but also intelligent" by her lawyer, had dropped out of the education system at 15.

Lily Pritchard-Davis was sentenced to four years and two months in prison. Photo / Facebook
Lily Pritchard-Davis was sentenced to four years and two months in prison. Photo / Facebook

She had attended 11 primary schools and two colleges, but had also been dealt with by the Youth Court on several occasions, many of which were for incidents of assault, threatening behaviour and vehicle theft.

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Her youth offending then became her adult offending when, outside a North Shore restaurant last year, she punched a middle-aged woman in the face and bit her on the thigh.

While on bail she then began stealing cars with a gang of offenders in September and targeting several stores for burglaries, including Onehunga's Cheesecake Shop, the Mangere TAB, and others along Coronation Rd.

When police showed her CCTV footage of the burglaries she admitted it was her.

But her criminal binge continued.

Pritchard-Davis was described as
Pritchard-Davis was described as "young, immature, but also intelligent" by her lawyer. Photo / Facebook

On September 12 she helped steal another car and ransacked a Grafton pizza store. After fleeing the scene she was soon seen by police on Hillsborough Rd and a 40-minute pursuit ensued.

On September 14 she committed perhaps her most serious of offences.

After stealing petrol from a BP in Mt Wellington, she and another drove to the Lagoon Leisure Centre in Panmure.

The pair parked their car next to the unassuming Nancy Voon.

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Voon was waiting for her son but the teenage girls had decided to carjack the 65-year-old.

Pritchard-Davis told police her offending would gain her
Pritchard-Davis told police her offending would gain her "notoriety among [her] friends". Photo / Facebook

Pritchard-Davis' co-offender threatened Voon with a screwdriver and stole her bag, before the girls dragged the small woman into the car park where she was punched twice to the head and kicked.

"They left her there to die. There was blood everywhere. All her clothes and the hospital sheets were all bloody," Voon's son Chee Phua told the Herald after the attack.

Voon suffered a broken nose and teeth, severe concussion, and a black eye. She spent several days in hospital.

While on the run, Pritchard-Davis committed an aggravated robbery and ram-raided a service station using a stolen Mazda. Cigarettes and $200 in cash were stolen.

Nancy Voon suffered a broken nose and teeth, a severe concussion, and black eye from the attack. Photo / Supplied
Nancy Voon suffered a broken nose and teeth, a severe concussion, and black eye from the attack. Photo / Supplied

Judge Ema Aitken said when police finally caught up to the teen, she claimed she had no fear of being sent to prison because it would gain her "notoriety amongst [her] friends, it makes you famous amongst your friends".

With Pritchard-Davis on bail and failing to show for her court appearances police went looking for her.

During a search on March 31, officers found her at a Manurewa property.

The teen locked herself in a bathroom to avoid arrest, and after a struggle was eventually handcuffed and wrestled into the back of a patrol car.

However, with a female officer sitting next to her on the back seat, Pritchard-Davis leaned over and "latched her teeth on to" the constable's arm for 20 seconds.

"You bit down with extreme force ... the officer says the pain was unbearable and thought you were going to take a chunk out of her arm," Judge Aitken said.

Police said Pritchard-Davis "ground her teeth deeper and deeper into the officer".

After the incident Pritchard-Davis was remanded in custody where she remained until today's sentencing.

During sentencing, Judge Aitken, on more than one occasion, was forced to stop her remarks in an attempt to regain Pritchard-Davis' attention, who was waving to her mum and family in the public gallery.

Pritchard-Davis and her co-offender fleeing after the attack on Nancy Voon. Photo / NZ Police
Pritchard-Davis and her co-offender fleeing after the attack on Nancy Voon. Photo / NZ Police

"Turn around please, this is not an opportunity to chat," the judge sternly said. "If you're going to keep looking back and waving ...," she continued, before the teen interrupted, "they're my family".

"Can you just concentrate on what's being said," the judge quipped.

As the sentencing continued Pritchard-Davis could also be seen seemingly smirking as the judge outlined the details of her crimes. However, as the proceeding progressed the teen's expression grew increasingly forlorn, appearing to appreciate the gravity of her offending.

"You do not appear to have support in the community," Judge Aitken told the teen, while her mother began to cry in the public gallery.

Pritchard-Davis' mother had also been imprisoned for the manslaughter of her baby daughter, Pritchard-Davis' sister, a moment in the teen's life which has had an enormous impact, Judge Aitken said.

Pritchard-Davis was also in and out of CYF care from a young age.

To cope, the court heard how the teen turned to alcohol and had become a daily user. Meth was her "drug of choice".

As Pritchard-Davis was led away to the cells, flanked by two guards, she turned and made one final wave to her family.

"Love you, bye."

She will spend four years and two months behind bars.

Pritchard-Davis' extensive rap sheet

• Two counts of aggravated robbery
• 14 counts of burglary
• Two counts of attempted burglary
• Three counts of unlawful taking of a motor vehicle
• Three counts of unlawful possession of a motor vehicle
• Theft
• Assault
• Aggravated assault against a police officer
• Resisting arrest