Probably Igor can’t agree with you on many points ... Regarding the filing of a lawsuit, the deprivation of parental rights is doomed to failure (based on the norms of the current family and civil legislation of the Russian Federation in a particular situation) ... Regarding the collection of information in the framework of a civil case in a lawsuit on determining the procedure for raising a child, only parents can be parties ... On the issue of simply collecting information confirming the antisocial behavior of parents, there are special units, in particular ONE (UMVD). KDN, which are able to collect such information and sources of information defined by the judicial practice and regulatory documents (in particular, the court adopts acts of inspection of the child’s living conditions at the place of actual residence, documents characterizing the parents, etc. as evidence.) The Supreme Court of the Russian Federation generalized the judicial practice and issued an appropriate resolution of the Plenum, which clearly indicates the information, which can be the basis of the dock For such cases, there is an indication of the need for various examinations, etc. So in order to draw any conclusions and make recommendations, you need to know the norms of national legislation in detail, and you Igor live in another state and apparently are not familiar with the norms of our Russian legislation governing such issues ...