That's my point. How? And with a high degree of certainty?
So how do you do that whilst preventing him pressing a switch that would kill you, him and god knows how many others?
So what would you have done in their place?
I wasn't. But then I'm not spouting crap like "Metropolitan Police - Shooting suspects since 2005" either.
As far as I know, you weren't there either.
But that's what they did, isn't it? Shot a suspect?
Immobilised him, and searched him.
That would be the point in immobilising him.