jeez im at a lost for words right now....sounds like you have alot on your plate....
you cant seem to locate him from family members? no one knows your siblings where abouts? why wont a detective help you????
when i go to work tonight ill check the missing childrens reports and see what i can dig up. ill do some computer work.....there has to be something on record birth certificate, Social ANYTHING at this point
if i can get a physical address through my work computer, i will let you know.
if you have a physical description of him too it would help along with first and last name.
im so sorry that all this is happening to you. anything i can do to help