They were just laying a barrage on him to discourage him from being too rambunctious.
Heh. Indeed. Bet it at least kept his head down.
There was a story from Lacey WA, near my hometown, several years ago just after the department switched to the 9mm auto for their standard issue.
One guy with a machete, in a parking lot. He was surrounded by a semicircle of six cops in a standoff when he lunged at one of the officers with the machete. All six opened up on him. He was still swinging the machete until the 19th round hit him. Two or three times that were expended.
One or two hits center mass with a .45 or even a .357 would have ended the matter.
I'm not a big fan of the 9mm for law enforcement purposes.