On the pages of this site you will already find the best information available on "How to Become a Police Helicopter Pilot."
However, before I retired in 2015 I had to exercise abundant caution about what I wrote and posted on this site. As supervisor in the Air Support Unit for the last 2.5 years of my career I sat on one interview board and assisted in the selection of several new members of our unit.
You can see how it might be a conflict of interest for me to write about the selection process in detail, while I was actively involved in not only the selection of new members to the unit, but in overseeing the transition of several members from TFO to Pilot.
As a former member of my aviation unit, I have much more freedom to write and pass on my knowledge of what it takes to get selected into the Air Support Unit of not only my agency, but virtually any U.S. Agency.
UPDATE- January 7th, 2017. I am currently hanging out at Jerry Trimble Helicopters in McMinnville Oregon working on my Instrument Helicopter Rating. Check ride is scheduled for Jan 16th! As soon as I am back in So Cal finishing this project is my top priority. Expect a finished product in early spring. Check back here for updates.