Strike Force Jounama has been formed to investigate reports of people linked to the Hells Angels gang robbing and intimidating 16-year-old boys in the Hills District and coercing them into carrying out crimes.
Detective Inspector Gary Bailey says the teenagers have been threatened with violence if they do not cooperate, and in some cases their parents have tried to intervene.
"There have been families that have paid money in order that their children won't get threatened any further," Detective Inspector Bailey said.
"In many, many of the occasions we got the information but unfortunately, because of the intimidation and fear from this group, people were reluctant to officially document the crimes against these people."
Police have released security camera vision of a man they believe can help with their investigation.
"These reports are alarming and highlight the fact that this Government needs to act on outlawing these gangs," Mr Robertson said.
"We're seeing them involved in shootings, now we're seeing them recruiting young students at school to get themselves involved in criminal activity."
But the state Liberal MP for the area, David Elliott, says he is confident police will find those responsible.
"Parents don't need to lock up their children in the Hills District. This is a very, very family orientated area," he said.
"Having said that, the Hills, when it comes to the criminal element of society is no different to the rest of Australia and I've every confidence that they'll bring this matter to a head."