"Technically, so long as a person isn't physically interfering with an on-duty police officer, it's legal to record the officer in every state but Massachusetts and Illinois. Arrests still happen in other states, but there's little legal justification for them, and the charges are usually dropped, or never filed at all."
Source(s):
Woman Could Get 15 Years for Recording Cops After One Of Them Allegedly Assaulted Her
http://huff.to/ik5VLw