McLaren took issue with the IOC and Russian officials who essentially claimed McLaren's report amounted to allegations. McLaren insisted his findings were proved beyond reasonable doubt and revealed he had supporting evidence in a secret location.
"I have the evidence, I have it secured. I have the evidence backed up by forensic analysis of databases, sample bottles, I have laboratory evidence of some of those samples.
"But if you conduct a proper investigation you don't put the evidence out there to create misinformation. I was at the stage where I could say what I knew beyond reasonable doubt.
"I wouldn't put anything in the report that I didn't have evidence and wouldn't meet the criminal standard in any court around the world. Nothing in there is an allegation."
McLaren intends revealing supplementary findings by the end of September.
He said the point that it was a state-run system seemed to have been missed by the IOC. He was never intended to identify individual offenders.
"It has been completely ignored and turned on its head and it's all about pointing blame at people and finding athletes that are doping."
On top of that, world anti-doping agency Wada is being blamed by the IOC for their handling of the crisis.
"We need to have an honest, factual debate about what is going on. Right now I think the discussion is not honest and practical, it is hysterical and political."