The club has been accused of deliberately deceiving the AFL by promising Kurt Tippett $200,000 outside of his contract and suggesting it be kept secret from the League.
The AFL is investigating a letter sent by then-Crows football manager John Reid to Tippett's manager Peter Blucher, which refers to payments not included in the contract Tippett signed in 2009.
It has been reported that the letter clearly advised Blucher not to make the AFL privy to such arrangements.
If AFL investigations officer Ken Wood finds there was wrongdoing when Adelaide re-signed Tippett in 2009, the ramifications are massive for the club, player and his management.
Trigg arrived at Adelaide's West Lakes headquarters on Friday morning and spoke to media as AFL investigators examined computers and bank records inside.
Investigators refused to comment.
Trigg insisted it was the Crows who had invited investigators to West Lakes and he maintained the club was acting with its best interests at heart.
"The only thing I can say at the moment and I particularly want for our supporters to understand this is that anything that we've done, anything that we're doing, anything that we're continuing to do has the club first and foremost in our mind," Trigg said.
"I want people to understand really clearly, we are the ones who initiated the investigation and we are the ones who brought on this extra examination.
"The extra examination is really because what this whole situation throws up is doubt and we want to eliminate doubt.
"We've invited the AFL to send in their forensic guys, work through the whole lot and make sure, so that at the end of it we can sit there and we can say, 'right, everything's clear'."
Trigg wouldn't be drawn into speculating whether he or any other administrator involved in the deal would face sanctions, but described the situation as a "pretty tough patch".
"There's lots of pressure on all sorts, but in terms of specifics - don't want to talk about it," he said.
"The investigation's still going…you'll ask me about people's roles and sanctions and be asked about potential outcomes; I just can't give it to you at the moment.
"The best I can give you is, everything we are doing is in the best interest of the footy club and protection of the footy club.
"It's a reasonably tough patch."
Time is rapidly running out for the Crows to strike a trade deal involving the key forward.
The AFL has reportedly told clubs it would not approve any trade involving Tippett on Friday, although Adelaide is believed to still be able to present potential trades to the League.
If AFL investigations officer Ken Wood finds there was illegal activity involved in Tippett's now-infamous 2009 deal, the forward could be deregistered from the AFL and the club would likely face serious fines and draft sanctions.
Harry Thring is a reporter for AFL Media. Follow him on Twitter: @AFL_Harry.
