The criminals are hiding in plain sight.
We are wasting time talking about guns and violent videos. Antidepressants are the culprits.
Other common denominators: They frequently commit suicide immediately after the homicide.
One does not need to be a medical genius to notice all of this. Simply watching TV commercials for antidepressants gives us the information that we need in the form of the listed side effects: hostility and thoughts of suicide among others.
Charges should be filed against the drug manufacturers and the prescribing physician, perhaps even the drugstores that fill such prescriptions. Civil suits could follow.