A man has been sentenced to 11 months in jail after he was found guilty of tormenting and killing a kangaroo, in an incident that’s been dubbed as ‘sadistic’.

Dylan Leslie Griffin appeared in Joondalup Magistrate’s Court, in Joondalup, 26km north of Perth's central business district, and pleaded guilty to attacking the animal with knuckle dusters before shooting it in the eye, in a brutal beating that took place last year.

The 22-year-old was sentenced to 11 months behind bars, meaning he could be eligible for parole in just six months.

Dylan Leslie Griffin (pictured) has been found guilty of tormenting and killing a kangaroo

He is the third man to be charged over the violent bashing of the innocent animal, with Magistrate Gregory Benn describing Griffin’s involvement as ‘whole-hearted, gleeful and sadistic’.

A fourth member of the mob allegedly involved in the kangaroo’s murder is set to appear in court in July.

It’s believed the incident is part of some sort of group initiation, with all the men having some kind of involvement in Outlaws Motorcycle Club, according to ABC News.

Handing down the sentence, Magistrate Benn noted that an instant jail sentence was ‘necessary’ and would act as a deterrent for Griffin and other wannabe gang members.

Many of Griffin’s supporters had attended the court proceedings in order to hear the outcome of his hearing.

But clearly riled by the magistrate’s decision to imprison Griffin, the group of hooligans erupted into an aggressive outburst.

After his sentencing, Griffin's supporters erupted into a violent outburst and attacked members of the media

As the violence descended, members of the media were heckled, with one man attempting to punch a television camera.

According to reports the man can be heard shouting: ‘F*** you, you smiling prick’ at the worker, as he tries to bash the camera.

The man was stopped from doing any further damage by other group members, and was later escorted away by court security officers.

Another man brazenly stormed out of the courtroom and walked straight up to a random member of the media and punched him in the face.

Local cops are currently looking into the incident outside the courtroom.