Bath Michigan 1927, nearly 50 mostly children killed by Andrew Kehoe.
Bomb, not shooting.
No difference for the killed and injured and their families, but a very different mindset in the perp.
Wiki: “After more than a week of testimony, the jury exonerated the school board and its employees. In its verdict the jury concluded that Kehoe “conducted himself sanely and so concealed his operations that there was no cause to suspect any of his actions; and we further find that the school board, and Frank Smith, janitor of the school building, were not negligent in and about their duties, and were not guilty of any negligence in not discovering Kehoe’s plan.”
We appear to have lost the ability to make such common-sense judgments.