The shooter used a rare weapon with an integrated suppressor (or "Silencer" as the article indicates). A British made station six 9. I wonder if that will be the focus of investigators, since its an highly unusual weapon.
There is an absolute zero chance that he used a B&T Station 6. The media, as usual, is 100% wrong.
It looks to me like a subcompact with no booster in the can. He is already dropping the gun to rack after the first shot, he knew it would need it, but it isn’t the welrod’s twist and pull.
Good for B&T sales though.