The revelation that a Sydney girl's alleged molester was on parole has provoked a call for a system-wide review of NSW's early release program.
The 54-year-old allegedly assaulted the seven-year-old in the toilet of a dance studio in Kogarah and then knifed a man who came to the girl's rescue on Thursday night.
The man had been on parole since September last year after being jailed over a violent sexual assault in the Illawarra region in 2012.
The State Parole Authority revoked his parole within hours of Thursday's arrest.
NSW Opposition Leader Michael Daley said the incident was more than just a rudimentary mistake and was a failing on the part of the government.
He called for a system-wide review of parole and more resources for police.
"The police do an amazing job keeping tabs on some of the most dangerous offenders in our society but they cannot do it with one hand tied behind their backs," he said in a statement.
NSW Corrections Minister David Elliott said he was "deeply troubled" after learning the girl's alleged attacker was on parole for a violent sexual attack and requested an urgent briefing.
Premier Gladys Berejiklian backed her minister and said her government would address any issue that may be uncovered in the dance studio case incident.
"Once we get further details, we'll determine if we need to take further action," she told reporters.
"NSW has the toughest parole laws in the land, we have the toughest supervision laws in the land.
"I don't want to leave a single stone unturned."
The man, who is yet to be charged, is accused of molesting the girl then stabbing a 46-year-old man in the abdomen and neck when confronted in the bathroom.
The 54-year-old was subdued and remains under police guard in hospital with facial injuries.
The man, who served three years in prison for the 2012 sexual assault, first became eligible for parole consideration in October 2016 but wasn't released until September 2017, a parole authority spokeswoman told AAP.
His sentence expires on October 21, 2019.
