To be honest, if my son was kidnapped, I'd do everything I possibly could to find him.
Anyone that says "You call your lawyer first", cannot possibly have children, or if they do, really need their priority sorting out!
Only thing that matters is finding your kid as fast as physically possible. If that means the police/FBI/whoever want to strip-search me to prove I had nothing to do with it, or search my house or whatever, I wouldn't care. Do whatever and however it takes to find my kid!
And I'm so, so sorry you and your family had to go through that. Holy cow, I cannot even begin to think how hard that must be.