((((Passionfruit)))) Would you consider contacting the national domestic violence hotline? They would be able to advise you on what you can do to protect yourself and whether or not you have enough "evidence" to go to the police.
For the US:
National Domestic Violence Hotline:
1-800-799-7233
1-800-787-3224 (TTY For The Deaf)
By state:
United States DV Resources by State
(Click on your state for various hotline phone numbers and other information)
Stay safe! Hugs, HG