The 17yo needed 40 stitches on his face after the sudden attack.
Police have not located anything dangerous.
The incident occurred at South City Mall in Christchurch.
He's been found guilty in the Auckland High Court.
Corrections' associate vice president says a "softening" in management has led to inmates thinking they're "bulletproof".
Tainui was on parole for the 1994 murder and torture of Kimberly Schroder.
Assaults on staff have been on the rise for several years.
He was walking with his older brother and grandmother when the incident happened.
It was initially believed Ian Pullen died after he was hit by a car.
The accusations are causing uproar on social media.
She's the second person to be charged with murder over the Ian Pullen's death.
The incident occurred on Thursday evening.
A chance encounter led to love but ended in a traumatic marriage with psychological abuse, betrayal and coercion.
Prabhu Karunanidhi appealed the decision in August but it was declined.
Pullen was killed after being hit by a car in 2018.
Nigel Fuatimu died in Jellicoe Park on October 3.
"It wasn't just a car accident - I was attacked."
The outcome of the year-long investigation was labelled as a "significant blow" to organised crime efforts.
The pursuit was deemed justified, even though permission wasn't granted.
Attempts to revive the man were unsuccessful and he was pronounced dead at the scene.
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