Did you read the post? The accuser did make several "formal statements", most of which went ignored.
> On my return, with an alternate way to stay in the EU secured, I prepared a written complaint and sent it to our department secretary on the 22nd of August...
...
> At the beginning of September, I spoke to two people in HR for nearly two hours, answering their follow-up questions about the complaint I had sent them.
...
> While in North America, an HR rep contacted me to tell me that I needed to personally meet with yet another person at the university, who is in charge of scientific integrity. I sent this person a copy of the same written complaint I had already sent to HR, and arranged a meeting.
So that's four or five people who received a formal, written statement from the accuser, and did nothing in response.
> On my return, with an alternate way to stay in the EU secured, I prepared a written complaint and sent it to our department secretary on the 22nd of August...
...
> At the beginning of September, I spoke to two people in HR for nearly two hours, answering their follow-up questions about the complaint I had sent them.
...
> While in North America, an HR rep contacted me to tell me that I needed to personally meet with yet another person at the university, who is in charge of scientific integrity. I sent this person a copy of the same written complaint I had already sent to HR, and arranged a meeting.
So that's four or five people who received a formal, written statement from the accuser, and did nothing in response.