Because you waited, you would need to go to your local district court and file an application for a criminal complaint for assault and battery. Whether or not you can use these circumstances to mitigate the offense charged, would be an appropriate question to pose to your attorney, should you choose to hire one, to defend you in the criminal charges. This is very fact dependent. Please speak with an experienced criminal defense attorney as soon as possible. Beat of luck to you.
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Speaking in the most general terms, being the victim of an assault is not a defense to DUI. There is a longshot possibility that you may be able to convince a factfinder that you were coerced to drive in an impaired state. In order to prevail with this type of defense you'd have to show that the timeline was very compact. Not much time should have elapsed between the fight and the escape. I think this defense breaks down if you drive any farther than was absolutely necessary to escape danger.
If you were the victim of an assault then you should apply for charges. The sooner the better.
The most important thing you can do right now is hire a lawyer to defend your DUI. Too much time and money is at stake. You need a lot more help than you can get on a message board.
I agree with the other attorneys. You already stated that you did not want to leave. You would have a hard time with your assault charge when it appears, from your own statement, you were not really in much fear as you had to be physically removed from someone else's house. As for driving only a short distance, it doesn't matter. The law says you can't operate the vehicle at all if you are intoxicated. It's good that you are thinking up a defense (sort of) but leave that to your lawyer. The one you came up with sounds like it will do more harm than good. Good Luck!
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