What we need is more armed patrolling of schools

According to reports from CNN, many officers attending the scene, were surprised to find not only that Broward County Sheriff's Deputy Scot Peterson, the armed school resource officer, had not entered the building, but that three other Broward County Sheriff's deputies were also outside the school and had not entered.

[...]

Coral Springs police entered the building once they had arrived at the scene, but were surprised to find the deputies still outside the building.

[...]

President Donald Trump said that Deputy Scot Peterson, who resigned after an investigation found he failed to confront the suspect, was a "coward."

"He trained his whole life but when it came time to do something he didn't have the courage. He certainly did a poor job."

"But that's a case where somebody was outside, they're trained, they didn't react properly under pressure or they were coward," Trump said.

  IB Times

Maybe he had bone spurs.

Deputy Peterson has resigned. What about those other three?

...but hey, do what you want...you will anyway.