A new report shines a light on the balance of power gangs hold in prisons - and how it impacts other inmates. 

A Corrections-commissioned study, chiefly authored by criminologist Jarrod Gilbert, shows gang-affiliated prisoners has doubled over the past decade. 

Corrections deputy director for men's prisons, Neil Beales, says there's been a noticeable increase in violent acts carried out by prisoners connected to the gangs.

"What we are seeing is an increase in violence, particularly in some of the newer gangs...also, there's the resources and the money that they have to carry out some of their criminal activities."

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