The police likely wouldn't get involved - period. This is a civil matter, not criminal.

And please don't assume that nobody else has gone through a similar situation.

The basic truth is that you've gone four years without seeing your daughter - you're not going to be able to simply turn up and get her tomorrow.

Think of HER.

Not YOU.

HER.

By all means, hire that attorney and listen to what s/he says.

Good luck.