You might want to talk to your town selectman or the mayor.
Someone either elected or appointed your sheriff / police chief. Find out who they answer to.
If you decide to go it on your own and try to deal with the cops directly, and they're still giving you a hard time, decide just how "bad-ass" you want to be. You may say you want to talk to someone in "Internal Affairs" or "Quality Assurance," or the town "Ethics Board," depending on how they're organized. You might also ask for the name of their insurance agency in case you wish to file a claim against them.
You can go to the station and ask to examine their logs for that night and see who was on duty and what calls they were out on at the time.
The logs are usually available for viewing by the public with little or no questions asked.
You could also file a Freedom of Information Act Request (FOIA) requesting information on who was driving the squad car at that hour, and if they were on a call or not. You can also request copies of dispatch and 911 tapes.
If they give you a hard time with any of that, explain that you have other legal avenues you can pursue to obtain that information which you're legally entitled to anyway.
My
personal feeling is that if you want to be taken seriously by the cops, find a lawyer to represent you. Have your lawyer tell the chief that he and his client would like to sit down and talk about the incident.
That gives the person in charge an opportunity to "save face" before you escalate it over his head or by going to the media.
There may be some kind of advocacy group in your area that monitors law enforcement and has a mandate to help you with this at little or no cost.
If that doesn't work, do a google search of your local newspapers, find a reporter who has written articles critical of police misconduct (or better still, your police department in particular) and contact that reporter directly.
I'm not a lawyer, nor do I play one on TV, nor did I sleep in a Holiday Inn Express last night. I'm just a chronic gadfly. This is not legal advice. And I am, after all, wrong 1/12 of the time.
See also:
Fully Automated, Fill-in-the-Blanks
State Open Records Law Request Letter Generator
http://www.splc.org/foiletter.asp