Hi. I'm sorry. My nephew has found out that the cops don't get involved in child custody even if there is a plan. They wont take kids from one parent to the other. It all has to be done in court and if your son is a teen he will have a say. They are more lenient as kids get older. Don't spend all your money on court. Dad will be seen as equal to you. That's how it is now.
If your son lives in another state maybe you can move there and see of you can share custody. My nehews son is 15 and he had a say in court. My nephew had to pay through the nose for court, but he makes a lot of money so he could afford a lawyer. He has joint legal, physical and medical custody. He has tried for full custody because Mom is pretty awful but best he could do was keep 50/50.
I honestly am shocked at how family court handles custody. Even with a good lawyer....no way it's about the best interests of the kids. And if you go to court and your ex keeps custody, which is very possible, you will have to pay child support, not him. Be careful what you do.
Hugs and love.