custody questionnaire

My son's father has had custody of him for the past 5 years. I am really concerned that he may have tried to adopt him out without my knowledge or something much worse could be going on?!?!? I have tried to do well being checks on my child and been denied by local law enforcement telling me not to check up on my child. I am even more concerned because this is his only son and unfortunately, I fear they don't love him like I do. Jessica Davis had a Facebook page for example and had only posted one picture of my child while she posted several of her children over the length of 5 almost 6 years when i asked why t she did not feel the need or desire to take pictures of my child she blocked me!!!!!! I find that a little peculiar after all it was just a simple question or suggestion that my son feel equally as important as her children do. Almost to me as if they are ashamed of him. Even though it is John's one and only biological son!!!