Jake Carlisle embroiled in drug scandal

Video has emerged which threatens to derail the career of AFL star Jake Carlisle on the same day he secured a much-anticipated change of clubs.

The brief video posted briefly on social media allegedly shows Carlisle snorting a white powder in a hotel room in Las Vegas.

The Nine Network alleges that Carlisle filmed himself, then sent the video to a friend via social media app Snapchat.

Although, it is unclear as to what the white powder actually is.

DONE DEAL: Carlisle finally lands at St Kilda

The 24-year-old is currently on holidays in America, where he flatly denied ever taking illicit drugs.

The controversy comes on the same day St Kilda landed their primary target of the AFL trade window, signing Carlisle despite interest from premiers Hawthorn.

After protracted negotiations, the involvement of Sydney proved the circuit-breaker that allowed Carlisle, 24, to get his wish to move to the Saints.

The Bombers secured pick No. 5, a selection they had demanded in a straight swap for Carlisle, and also snared Swans midfielder Craig Bird, while St Kilda also landed Sydney's first-round pick (No.14) in the deal that involved an exchange of lower draft selections between the clubs.

"We're really pleased to bring Jake in while keeping a pick in the first round," St Kilda football chief Ameet Bains said from AFL House.

"I think everyone's a winner in this deal. There was bemusement at our end that everyone was so keen for us just to hand over pick No. 5 and get the deal done.

"We weren't averse to using that pick as part of this trade but we felt (a straight swap) for Carlisle wasn't the best deal for us ... we needed to get something else.

"Given there was an impasse with Essendon it did involve third parties. After talking to five or six third parties we were able to structure a deal with Sydney that everyone should be happy with.

"We were very confident that Jake only wanted to play with us."