...you don't FORGET anything.
You know where it is at any given moment. You know if it's loaded or unloaded. You know the serial number, or have it written down where it can be quickly retrieved.
Owning and using a firearm is more than a right - it entails responsibility. Your friend made a very careless mistake and unless he manages to plead down to a misdemeanor, he may neevr be able to legally own a firearm again.
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