Suspected criminals as young as 15 could be DNA swabbed before they are even charged under new laws Victoria Police also hope will crack cold cases.
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Police would be given powers to take DNA samples from suspects as well as confirmed serious criminals under proposed news laws that entered parliament on Wednesday.
"I can't understate just what a significant reform this will be for Victoria," Police Minister Lisa Neville told reporters.
"Firstly it brings us into line with the other states, secondly it will provide perhaps the most effective and accurate way of being able to identify offenders very quickly, solve crimes very quickly and get those through the courts very quickly."
Victoria Police has more than 55,000 crime scene DNA profiles which don't match the profile of any person.
It's estimated that under the proposed laws, which would bring Victoria into line with other states, the number of DNA reference samples in Victoria Police's database would increase almost tenfold from 8000 to 70,000.
That is tipped to lead to 29,609 matches between people and crimes and 447 matches between crime scenes.
"It's important when we're solving crime and dealing with offenders that we create a national framework around which offenders can't move around the country to avoid culpability for crime," Chief Commissioner Graham Ashton told reporters.
"If we've got offenders that are travelling, committing offences here, heading interstate, there's a better chance of catching them."
Mr Ashton said it also meant more DNA could lead to cold cases being solved, but the potential number was hard to quantify.
The laws were first flagged in December 2016 and Ms Neville said it took 18 months to get the model right.
The laws are part of the proposed Justice Legislation (Police and Other Matters) Bill 2018, which also includes tougher penalties for people found to have harmed, intimidated or harassed police officers, protective service officers and police custody officers.
Those found to have intentionally or recklessly assaulted an officer could face up to 10 years behind bars or 15 if a firearm is involved or discharged to threaten an officer.
The government also introduced its bill to tighten mandatory sentencing requirements for people who assault emergency service workers such as police and paramedics.
Opposition Leader Matthew Guy said his party would support all of the laws through parliament, but criticised the government for taking so long to introduce them.
Australian Associated Press