They screwed up, as even they now admit.
They HE screwed up, as even they now admit.
I don't see this as a screw-up.
Men with bombs are blowing up train stations and killing people.
A man in heavy coat in summer comes out of a building under surveillance for terrorism.
When told to stop, he runs into train station.
He jumps the turnstyle and heads into a trian.
Is there any other logical outcome other than he turns out to have a bomb and kills lots of people?
The officers did exactly the right thing.
The death was unfortunate, but there was no reasonable alternative for the police.
The police made the right decision under the circumstances.
Not they didn't. They were mistaken about the target, but that doesn't make their ecision wrong.
They did not screw up!