A thief in the house

I've lost 50 bucks.

Not a lot, but the fact that the money has gone missing in your own house is not comfortable..

Now I have to look for a new place & a more secured area to hide my things. It is so sad that you have to hide stuff in your own room. There's no privacy, no security, no freedom to keep & do things in your own room.

What should I do to make the thief confess? Is there any way to do it without obviously knowing that I'm looking for him?

Maybe I should start locking my room..

So sad man.