Domino The first para is why I've laid out for you what is suspicion (regardless of if with good cause or not) and what is fact.
It's hard to see at the time, but the best way to protect your family from people like him, is to 'appear' to be unafraid of telling.
If I'm right about what he is, he will target those who can be isolated from others, have lower support networks, difficult backgrounds and families, self esteem issues, who don't expect to be believed, and have a sense of needing to hide, or cover up things.
They don't generally target the sort of females whose parents are on hand and likely to step in, or who will automatically go to the police.
When they do accidentally encounter these sorts of females, they find them too difficult to manage, and go find easier prey.
It took me years to understand that my best course of action was to fight fire with much bigger fire, very publicly, not try and put it out, cover it up, not upset him, or escape it. But by then things had seriously escalated for me and my DC's.
I spent 2/3rds of a lifetime looking over my shoulder, my advice is not to do the same.