A central figure to ASADA's investigation into drugs in the AFL has claimed the sport is facing its "Lance Armstrong moment".

Biochemist Shane Charter is set to spill the beans on his involvement in the scandal that's engulfed the Essendon football club, and he said he has evidence to back his claims.

"We have text messages, emails, invoices," Charter told a press scrum this morning ahead of his interview with ASADA.

"I’d like to be a part of (the investigative process) and aid and assist in any which way to move that process forward."

Charter said he would answer all questions put to him, including his relationship with controversial sport scientist Stephen Dank, and claims he sourced a number of materials for him.

Dank is one of the key figures in the investigation and is central to Essendon's alleged involvement in the scandal.

Charter said he would like to see the cloud hanging over the football season lifted as soon as possible.

"Unfortunately for football this investigation has overshadowed the football season this year, however the process was both timely and necessary given the advances in sport science and the now obvious lack of governance and procedures in clubs," he said.

"I know both the public and the football community would really like this process to be finished; find out what the findings are, deal with them appropriately and move on.

"But this has been made very difficult to achieve given that the Australian Crime Commission report and information has not been able to be used by ASADA, and ASADA have basically had to work from scratch."

Charter claimed a lot of "public misinformation" had influenced ASADA's efforts in completing the investigation, and wanted to play his part in bringing about a conclusion to the investigation.

"Most importantly, key individuals that were required to give information to fill in the gaps have not fronted ASADA for whatever personal reasons and that provided more questions than answers in relation to what was needed," he said.

"I’m here today to try and fill in those answers for ASADA, along with (providing) physical evidence in relation to that process and at the same time deal with the issues that ASADA raise.

"This hopefully will expedite the process and bring it to a conclusion in a more timely manner and we can get on with playing the game of football.”

Essendon hired Dank in 2012 before sacking the sport scientist mid-season.

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