Damn well wait until you find out how many gun deaths are unnecessary.
Safe storage for firearms is desirable but requiring the prosecution of those who made a good faith effort and failed is not.
Then that prosecution can determine if a good faith effort was made or if the parents were negligent with the storage of their firearms, rather than the usual pro-gun stance of “every solution must be 100% effective (except ours) while never even mildly inconveniencing us and if you try and make it actually happen we’ll kill you”.