First, it depends on what his offense was - if he molested children, then sure, you might want to the police a call. If he raped older men/women, then moving next to an elementary school probably means nothing. Bear in mind, however, police will be keeping tabs on registered sex offenders (this is who they register with in the first place).
If you do end up calling, they may already know he's there.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.