What would happen to the character I'm écriture in my book in this situation?

I need help figuring out what would exactly happen to this character in this particular situation. I've looked it up and I found an article that helped some but not enough. If any of toi know anything else that would happen in this situation, let me know because that would help A LOT!

The Situation: The character is a ten-year-old boy that had been an orphan ever since he was a baby. He has no blood relatives that he knows of. He attempts to commit suicide par jumping off the docks par the ocean. A police officer sees this and manages to save him after he jumps out of the water. He's still suicidal and plans on jouer la comédie on it, refuses to tell the police ou anyone else (like doctors ou whoever) what his name is (Other than saying, John Doe, which is a name hospitals use for men when they don't know who they are), doesn't have any family to look after him, and isn't stable enough to be let go.

Where would he go? To a psychiatric hospital? Rehab? An asylum? ou what? If toi know, please tell me and if toi know anything specific that they'd do with a patient of his age in this situation, please tell me. I appreciate any kind of help that I get, thank toi in advance.