ASADA CEO Ben McDevitt remains scathing of Essendon's 2012 supplements program, labelling it "absolutely and utterly disgraceful", despite 34 current and former Bombers being cleared of anti-doping charges.

McDevitt will front a news conference on Wednesday morning but AFL.com.au understands he is not likely to announce whether ASADA will appeal the AFL Anti-Doping Tribunal's verdict.

ASADA has 21 days to appeal the verdict and it is believed McDevitt will need more than just Tuesday night to make a decision on the anti-doping authority's response.

However, Stephen Dank, the sports scientist at the heart of the program, pointed the finger at ASADA for bungling its investigation and the AFL for "stage-managing" the process since it was first announced in February 2013.

The AFL Anti-Doping Tribunal is yet to deliver its verdict on anti-doping charges against Dank. A result is expected after Easter.

McDevitt said after the verdict was released on Tuesday afternoon: "What happened at Essendon in 2012 was, in my opinion, absolutely and utterly disgraceful. It was not a supplements programme but an injection regime and the players and the fans were so poorly let down by the club.

"While I am obviously disappointed that the charges in this instance have not been proven to the comfortable satisfaction of the tribunal, I am pleased that the tribunal was able to finally hear these matters."

While most key figures in the controversy, including Essendon coach James Hird and AFL CEO Gillon McLachlan, say they are keen to move on, Dank remains furious.

"I've understood from the very early days how this thing was stage-managed," he told the Nine Network.

"I think we know the script was written from day one ... by the Australian Football League.

"There are still things that I need to do going forward that I will do and my legal team will do."

But Dank's sharpest barb was saved for ASADA.

"They've been very, very poor in their conduct, execution and understanding of this whole investigation," he said.

"The players never took anything that was illegal or anything that was against the WADA-prohibited list.

"The players were not guilty of anything. I'm very happy for the players."

Dank also revealed a depth of support for coach James Hird, who he said was fully behind the supplements program.

"He showed a lot of faith in the program in 2012, he showed a lot of support, he believed in the program," he said.

"We had a very, very good relationship, never one cross word.

"He showed enormous courage in the back end, particularly in relation to the Federal Court matter.

"It was a shame he never continued through to the High Court.

"I have no doubt that he got an unbelievable amount of pressure put on him by the club in relation to those appeals."