You absolutely did the right thing!!!
I agree with others that you should do a search of your home for missing items, check all bank/credit card accounts, etc., change the locks, etc.
You also need to give some thought as to what you will do when your daughter appears again. She is 20 years old and is living with someone ... you cannot treat her like a little girl anymore, even if she comes back. She will be back, but it may be just to play on your emotions in order to get money. I know this sounds harsh, but your daughter has a problem in that she is attracted to men that behave badly. It is most likely a self-esteem problem and you will only be adding to it by treating her like a child. In the end you will be the "Bad One".
If she comes back and is still involved with him (or someone like him), stand firm and hang onto your wallet.
If she comes back brokenhearted and is ready to make amends, set up the ground rules about what you will and will not tolerate and what you expect from her in the way of turning her life around. If she is not willing to do this, then let her go.
I saw this with my SIL and her relationship with her parents. Her mother GAVE her everything!!! In the end, she wasn't there at the end because she couldn't afford $7 in gas to drive to the nursing home, but could somehow afford booze and cigarettes!! She has some of the inheritance money now and was kicked out of her trailer for non-payment, is living at a motel (for 3 months now) and has been beaten up by her husband. It only gets worse, so you need to be the strong one and, hopefully, things can be turned around before it is too late. DON'T BE AN ENABLER!
You did the right thing, but need to be thinking how you will handle things when she shows up again ... because she will. Seek out organizations that support parents such as yourself (Tough Love).
Keep loving her enough to do the right thing.
