So, how did this all come to light? 

The victim of Liam’s abuse came on here and posted screenshots of some of the things that Liam had said and done.

These included some incredibly perverted and unsolicited comments towards female members of his friendship group at the time. 

I have so many screenshots just like this. For example in the last one, he took the face of a girl he knew IRL, and made it into a TikTok with that caption.