Yes. Too much happening, going through tough times
Sorry, you're stuck with your BIL for the moment.
However, you haven't expanded on the problem if asked.
If he's just annoying, then you make the best of it, and resolve the issue when you and your wife mediate over what to do about the marital home. If she stays in the marital home, it's none of your business, but if you get the home exclusively in the divorce, then you have options to get rid of him.
When you can reasonably call the police to get him out:
1) If he is doing something blatantly illegal. Like, dealing drugs.
2) If he is acting violently. Like, if he hits people, throws things at them, smashes your property. Then, if you didn't initiate or contribute to the violence, you might have be able to get a restraining order.
3) If he is abusing the children.
You get the idea. Merely annoying is not enough.