Dr. J said:
It is perfectly legal to do so, and who knows, it might turn out that there is some confusion as to what actually happened during the stop. Your recording could prove quite useful.
Careful, Dr. J! This can get you arrested and convicted in some states!
Recording conversations is a creature of state law and varies by jurisdiction. For an overview of phone and in-person conversation laws recording broken down by state, see
this web guide.
Some states allow one party (the person with the tape recorder) to provide the necessary consent ("one-party consent"). Other states require
all parties to a conversation to consent (slightly mis-named "two-party consent", since there can be three or more parties as well). In the latter type of jurisdiction, one is required to get the police officer's consent in order to tape.
I had occasion to read through some MA law on this a while back, and ran across this:
Com. v. Hyde, 750 N.E.2d 963 (MA 2001).
Defendant moved to dismiss charges that he unlawfully intercepting the oral communications of another by secretly tape recording statements made by police officers during a routine traffic stop. The District Court Department, Brockton Division, Plymouth County, James F.X. Dinneen, J., denied motion. Subsequently, defendant was
convicted by a jury in the District Court Department, Brockton Division, Plymouth County, David G. Nagle, Jr., J., of the charges, and he appealed. On grant of defendant's application for direct appellate review, the Supreme Judicial Court, Greaney, J., held that electronic surveillance statute prohibited secret electronic recording by a private individual of any oral communication and made
no exception for
defendant who, having been stopped by police officers, surreptitiously tape recorded the encounter.