People knew the shooter in Annapolis was a danger to the newspaper. Employees were warned. Police investigated his on-line comments, and determined he is not a threat. Employees were told to call 911 if they saw him.
Five years later, he kills 5 people with a shotgun.
“Newspaper Warned About Shooter,” The Wall Street Journal, June 30, 2018 A3.
Maybe that’s why the police got there in under a minute.