Recording Police Misconduct is Illegal

mypalmike writes: "The Supreme Judicial Court of Massachusetts has upheld a lower court's decision that it is illegal to record what happens to you when get pulled over by the police. It seems they are citing a rule which essentially prohibits all recording in which the recording is made secretly. Maybe I can sue the local quickiemart for secretly recording me as I purchase a slushie. (Reported in the Boston Globe)." I'm not sure I understand this. Aren't almost all police cars these days equipped with video cameras that record everything occuring in front of the car?