/vt/ - Virtual Youtubers

I didn't expect that I would ask /vt/ about something like this, but more than confessing a sin I have a problem and I'm desperate about asking someone

I've been keeping track on a bunch of pedos online for at least two months, and I discovered that someone I know was suspicious and had ties with them. After gathering concrete proof of incriminating behavior, I confronted him and he admitted he's a pedo

However, he said to not wanting to harm kids and he just wanted to see what other pedos (who are pro-contact) were doing. Should I leave him alone, expose him, or just cut all ties to him? Regardless, I'm keeping the proof of him being a pedophile