Bruce documents the cases that hit the press of licensed gun owners there (to own a gun in Massachusetts, you have to be licensed, and licenses are may issue to be able to own handguns), and finds that licensees seem to get a lot more negative coverage than non-licensees when they commit crimes.
This is an important reason to oppose licensing in my view. It’ll never be spun in the media as an unusual case, but precisely because it is unusual, it will be guaranteed to attract media attention. That will only strengthen the case for total prohibition, as our opponents will be able to point to many stories of violence at the hands of licensed gun owners.