You can get a restraining order, which will get her out of the house. At least that will give you some peace and quiet.
You have police reports, and the DCF evaluation, so I rather doubt that the court will permit her to take the kids.
You do need some legal help, though. Contact your local bar association to see if they can provide any assistance.
I also suggest you go to Al-Anon--it is a lifesaver for a lot of spouses and partners of alcoholics.