The simple answer is that there was nothing illegal with the facts as you presented them. If you are charged, you should retain a criminal defense attorney and they will explore all options for you.
At first glance, yes. However, if you were arrested for a DUI, you'd be wise to retain a locally experienced DUI attorney to review every aspect of your case. Doing so will give you the best chance of fighting it or mitigating the charges and punishment you are facing. Good luck.
Given what you have presented, I do need see a successful suppression motion. HOWEVER, there is a lot more to this and there may be other ways in which he violated your rights. I full review needs to be done.
This is not intended as individual legal advice and there is no attorney client relationship established by this answer. It is advisable that you seek individualized legal assistance. This is not a substitute for hiring an attorney.
Ii agree with all that has been said thus far. I write separately to note that if the officer who followed you for 5 miles was out of his department's jurisdiction when he entered your driveway, you definitely have an issue on that. Sorry, I guess you mentioned in a comment thst this hapened to someone else. In any event whoever the accused is would have a good issue.
While it may not be illegal, it does raise a number of legal issues. There are a number of studies that suggest that a police officer following you (especially if he is driving too closely for road conditions and speed) negatively effects one's dring ---- which is part of the reasonable supicion neccessary to pull someone over for Driving under the Influence.
You need to get a good criminal defense attorney for this case and go over the entire affidavit of probable cause with that attorney, there may be more legal issues in this case.