I am quite certain that the Department of Children Families (DCF) can get involved even without the father getting arrested in the presence of the daughter. DCF can and will remove children from homes where they are being neglected and/or abused. But even if DCF cannot or does not help, your wife can ask the judge in the family law court where the original custody order was entered to modify that order.
If what you say is true, something must be done quickly. It sounds like these children are seriously neglected by the father. Your wife should speak to an attorney who can give her all of the options based on the specific facts in your case.
I suggest you speak to an attorney in your area who has experience in family law. That attorney would be best able to address the specific circumstances in your case and to explain the options you have. The information above is for informational purposes only, and providing it does not establish an attorney-client relationship. Good luck.
Even with the serious evidence you've listed, I doubt you could get the father's rights terminated. Still, you could possibly have his timeshare restricted to a supervised status. Your wife needs to talk to a lawyer immediately.
The contents of this answer should be considered friendly advice, not legal advice (I'm a pretty friendly guy), and the answer should not be construed to constitute an attorney-client relationship. If you'd like actual legal advice, call me for a free consultation at 813-635-0222. Also, if you liked this answer as much as my big ego thinks you did, be sure to click the thumbs-up button!
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