I think if you can't believe her on a lot of what she says or it doesn't make sense, I wouldn't believe her 100% on what she says about him or their relationship either?

I don't see how you can help them if they're not trying or ready to get the help they need. I would just wait and see what the judge says in June, by then things might have changed even more/again. Unfortunately, if he's not caught driving drunk, I don't think anyone is going to have him take breathilyzer tests or anything; what people do in their own time/place isn't their concern. With them still living together and her pressing charges, that might get less done too as the judge will probably wonder, like you have, why she is still living with him if he's throwing chairs at her or whatever.

It does sound like they've got a lot of problems that you can't help with. I would see if you can find other friends at church? It is probably not helping you to be messed up in their drama without having other friends/interests to even things out for you and make you feel good.