You said, "I don't even want him in my house. Isn't that bad?"
No, you finally got to the point where a lot of us were weeks ago. And it took him to hurt another one of your kids to get you there. I see the pattern, and I would like to point it out to you, and maybe it will help you along your journey with your adult children.
You are SO a caretaker. I bet you put yourself last while raising your kids. Well, you are doing it again, but so much that it is having an adverse effect. On the older son, up until now, you were caring about him so much that your doting was harmful instead of helpful. All of our suggestions sounded cruel to you. Just not in your nature.
Until.
Until Older son hurt younger son. Natural order of things, you come to younger son's rescue.
You put up with older son's shennanigans as long as it was only YOU being hurt. But when another one of your offspring is affected, your instincts kick in, and you immediately go to the aid of the weaker child.
Sounds animalistic and oversimplified, but that's how I see it. Am I far off?
And now that you finally DO put your foot down, you are second guessing yourself. Not sure if it was the right thing to do. In your shoes, I would not want him in my house either. I would not trust him in my house either. In fact, until easy child's belongings resurface, difficult child is as much a suspect as anyone.
I would tell him that he is not allowed in, and follow Karen's advice by changing the locks. Prevention! Who knows what gets stolen next...
Kudos, big ups, high 5, way to go, hugs, and hallelujah for taking a stand.