Hello everyone, so complicated story, my friends BIL lives in WI and his ex is married to a convicted pedophile.

So generic question here: Do you have a reccomendation for a good lawyer/PI and what would you suggest doing in this situation and I am not familiar with WI law.

He has custody of theier daughter she has custody of the son and the son is refusing to see him ectect....

CLEARLY the fact that she is married to a convicted peophile is not enough for him to get full custody of both children so any suggestions WI'ers?