There is a question I ask myself sometimes "Why do the bad men live and the good men die" Poverty has corrupted some people's minds and made them do heinous things just to survive. I understand where you are coming from because I was once in the same situation when my father passed away. People that don't bother to call or check on us appeared all of a sudden and all they kept asking was what about his properties overseas.
Don't worry bro you will get past it. I wish you the best as you move forward.