Where did he acknowledge it? How about in his own statement:
My words, whether in reply to a reporter's question or in addressing a personnel issue, must be clear compassionate and most of all, completely accurate
I failed on many of these fronts. My intention was not to say anything inaccurate or misleading
In that statement, he said he was aware of the 2015 incident and reported it to proper channels. He was repeatedly asked about 2015 in Chicago and feigned ignorance. Why not say he was aware of an incident but that he couldn't find evidence supporting an arrest?
Second of all, after Snook's report yesterday are we even sure that "there was nothing" is even a lie? If Snook's report is true then it sounds like there was nothing there.
Possibly. But Zach did say that Gene called him while he was on the road recruiting and told him to come home, so at least, institutionally at Ohio State, there was "something" there.
I don't think misleading the media that day is grounds for termination, but from our perspective, it's clear he was being untruthful.