"I can vouch there was nothing malicious. You had no idea that he had taken offence to it and whether that was whether he was still young and as he said he was still trying to make his way at the club and he didn't want to make a deal of it and what not.
"I never thought in my head,'F---,that's racist'. I never had that thought but then once he got up and spoke to the group several years later - he had grown up a little bit more and actually understood what that could actually mean and how it could be interpreted - once he said that most of us were like'Oh shit,yeah,we haven't thought about it like that and then it stopped."
Dawes toldThe Feed:"You mentioned the nickname ‘chimp’. I heard that a couple[of] times.”
Despite Collingwood's hope that he would be part of the process,Lumumba said on Twitter on Wednesday that he does not intend to participate in the investigation.
"I have no desire to convince Collingwood of a truth that they already know. Given the club’s inability to come clean,and the way it has attempted to publicly and privately attack my reputation,I cannot accept that this ‘integrity’ process has been proposed in good faith,"he tweeted.
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Buckley said the process would hopefully lead to lessons for everyone.
"There are a lot of details that need to be unearthed and shared with an open mind and an open heart so that we can address this situation,we can address Heritier's experience,not to sweep it under the carpet or necessarily just to resolve it but to learn from it and hopefully to be better from it,"Buckley said.
Macaffer said while there was no doubt about the nickname,he could understand if not everyone at the club was aware of its use although he would be surprised if teammates weren't aware of the name.
"It was always'H'or Harry,and then'chimp'. It was just one of those things,"Macaffer said.
"I can see how admin or even like Eddie[McGuire] wouldn't have heard it before or being aware of it. I can absolutely get that and it would probably be a thing that unless you were right next to him in the changerooms as a player you probably didn't hear it or know about it.
"There was no one that could possibly deny from a playing point of view."
Buckley did not play alongside Macaffer but returned to the club as an assistant coach in 2010 before taking over as senior coach from Mick Malthouse in 2012.
Buckley was captain of the club when Lumumba made his debut but the 33-year-old premiership player has stated publicly that he lost faith in Buckley at the end of 2014.
Buckley said he would approach what lay ahead with an open heart and mind and was prepared to learn from whatever occurred.
"Clearly my character is being questioned in terms of race and I know where I stand in that regard,"Buckley said.
"We will do this the right way and we will do it with integrity and that won't be in the public forum in the short term."