"You just build a bond and make him part of your family."
The 18-month-old german shepherd graduated with his brother Vann, and eight other police dogs.
Benson said a lot of police, when they join the force, want to be dog handlers.
"I was lucky enough to do the hard work and follow through and got a position.
"I initially work five years in Gisborne as a dog handler, and then transferred back."
Vink's brother Vann is moving to Dunedin with Constable Marcus Saunders, who is a first time dog handler.
"The training both at home and at Trentham has been great," Saunders said.
"There's a lot to learn including how to read your dog, understand what that flick of the tail or head means, and the skills and techniques for both of us to do the job."
The other dogs who graduated on Thursday are Parko, Usain, Tomeke, Moon, South, Shaq, Lomu and McCaw.