Go read it on your own.Massachusetts Trial Court Holds Gun Storage Law Unconstitutional:
After a police officer's 12-year-old son got access to the officer's handgun, the officer was prosecuted for violating Mass. Gen. Laws. ch. 140, § 131L:
It shall be unlawful to store or keep any firearm, rifle or shotgun ... in any place unless such weapon is secured in a locked container or equipped with a tamper-resistant mechanical lock or other safety device, properly engaged so as to render such weapon inoperable by any person other than the owner or other lawfully authorized user. For purposes of this section, such weapon shall not be deemed stored or kept if carried by or under the control of the owner or other lawfully authorized user.
Last month, the court held the statute was unconstitutional (Commonwealth v. Bolduc), and dismissed the prosecution. I only just now managed to get a copy of the opinion, and here's the relevant discussion: