Something like that happened to me Ariel.
Squeeky and I were driving home one afternoon, I turned my left hand turn signal on at the street just prior to "Our" street.
I looked in my rearview mirror when I turned on the signal, I saw a truck wayyyy back behind us, no threat at all! By the time it took us to go about 50 meters to our turnoff the truck was passing us on the left.
I barely avoided getting run over by that United States Border Patrol vehicle. ( We live less then 40 miles from Mexico ) He swerved violently to avoid hitting us, no emergency lights were on at all. Squeeky was hurt by my avoidence manuever, I was thoroughly PISSED!
I got back on the road and sped up to get the identification numbers off the truck, like the plate # and the vehicle id #.
He sped up trying to outrun us..... Finally at 90 MPH he couldn't go any faster and we caught up. I wrote the #'s down and dropped down to the posted speed limit, 45 Mph.
I turned around and went straight to the Sheriff department ( on that same road ) and reported it. They told me that there was absolutely NOTHING they could do about it. I went ballistic! They suggested I try the Border Patrol offices 15 miles away.
I did, the Captain in charge listened very patiently and asked for the id #'s for the vehicle and said he knew exactly who was driving.
He then asked us what we wanted to have happen. Squeeky and I talked it over and all we asked for was a face to face appology. The Captain looked relieved and said he would get right on it.
The Agent never showed up, never talked to me, never identified himself at any time. I later talked with the same Captain and told him that that agent never appologized and he said that he couldn't really force him to as I didn't go to the main office to file my complaint.
I learned right then the only way to deal with anything like this ever again was to go to the State commander and tell them why you are writting to the Commander of the service in Washington D.C. and to all the Senators on the various committees that control the spending for the U.S.B.P. and to all of the states media (newspapers, tv stations, etc...) and to the states ACLU offices.
Never go to the LOCAL authorities, all they will do is cover it up, ALWAYS go straight to the top of the beurocracy(sp?) if you want anything to get done!!!!!!