THE AFL is investigating a three-year-old video of former premiership star Shane Mumford snorting a large quantity of white powder after the Giants confirmed his involvement.

The widely-circulated video, which is being investigated by the league’s integrity unit, of the shirtless Mumford shows him waving his hand in front of the camera and several lines of a white substance on a table.

The ex-Giant, Swan and Cat then leans over the powder on the table and inserts a rolled up piece of paper in his nostril.

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People surrounding Mumford are seen and heard egging him on both before and during the act, with his nickname ‘Sausage’ being chanted in the background.

The release of the video comes as the Giants seriously consider re-drafting Mumford. He retired at the end of 2017 due to a foot injury, but could return to help the club address its ruck chasm after impressing in training sessions as the club’s ruck coach.

The Age reported that Mumford had been taken ownership of the incident and been frank with the Giants over his involvement in recent days. He could also be charged by the AFL for ‘conduct unbecoming’ as he’s a ruck coach at the Giants and a club ambassador.

When approached for comment, Mumford told Ten News: ““Nah, I’m not making any comment at this time buddy.”

The Giants on Tuesday confirmed Mumford was the person at the centre of the video, adding it was their understanding the video was taken in 2015 in the weeks after he suffered a season-ending injury against Collingwood.

“The Giants are aware of an incident, and associated video footage, regarding Shane Mumford from three years ago,” the club statement read.

“The club understands the incident took place in 2015 shortly after Shane had suffered a season-ending injury in Round 11 that year.

Shane Mumford played for Geelong, Sydney and GWS. Source: Getty Images

“The club is extremely distressed by the footage and views Shane’s actions as completely counter to the club’s values.

“The club is disappointed in Shane’s choice of actions at this time and also understands that Shane requires a level of medical support with his health and well-being in mind. The club will be working with Shane to ensure he engages in a rehabilitation program along with a range of other measures.

“Shane has expressed deep remorse, embarrassment and distress in relation to his actions. He understands he has let himself, his family and the club down and caused great embarrassment to those around him.”

The club added that it had kept the AFL informed of the matter.

“We are aware of a video currently circulating and are looking into the matter,” an AFL spokesman said.

“We won’t be providing any further comment until we have all relevant information and have completed our inquiries.”

Former Western Bulldogs ruckman Luke Darcy told Triple M that it was “an unbelievable bit of vision”.