Since it is out now. Why not try and SciFi to or Fox and bring it back on in the making.

All I can say as bad as it is that having that person around children. The only thing I could think of is obeserve him around the chilkdren and see if he poses any danger tot those attending, not to mention having the proof would also be a good thing to have as well. Other than that I don't think there is much you can do until he either leaves or sadly is caught, which would be unwishful for any child to gog through.