This is what it is going to have to come down to, IMO. This is not about gun control, but about a gun owners responsibility.
I am assuming the shooter (or shooters) is also a student. I am also assuming that like most of these cases, they acquired their guns and ammunition from their parents collection. Parents are being charged left and right when their children get a hold of their guns and accidentally shoot themselves... well, I am going to take it a step further. IF a child gets a hold of a gun in their parents home and goes into a school and takes the lives of others... they need to be charged with a crime. I will go even further and say the charge should be negligent homicide for every single victim and figure out what kind of charge would come from those injured, but not deceased.
I have no problem with responsible adults owning guns. I am against these weapons being readily available to underage children. I am also against them being readily available to adult children who do not own the gun/s. There is no reason why anyone but the licensed gun owner should have access to their gun/s.
They charge parents with a crime if their children miss too much school!! So, they can surely hold them responsible for this.
I do understand that there are parents who take their children hunting, target practicing, etc... That is fine too. What isn't fine is them knowing where the key is to the gun cabinet or code to a safe, etc... Only under a parents supervision should children have access to a gun... if it is for sport/hunting as a way of life, etc...
MOO