And if Huggins had negligently killed the man, (link fixed)

we'd have heard a story of 'defending against a knife attack'.
An Edgewater police officer is under investigation for accidentally discharging a rifle while answering what turned out to be a hoax call, a police official said.

Timothy Huggins, a 16-year veteran of the Edgewater Police Department, discharged his firearm as he and another officer were at a home in the city checking out reports of a hostage situation, Edgewater police Capt. Joe Mahoney said Tuesday.

And, Daniel Mease, 25, a Marine veteran who said he was at his father’s Kumquat Drive home visiting for Memorial Day, claims Huggins was careless and negligent with the handling of his firearm.
I tend to take the word of the Marine on this.  Especially after reading
Mease said Huggins pointed the AR-15 while the other officer aimed a Taser at him and asked him for identification. As Mease, who retired from the U.S. Marine Corps after a seven-month tour in Afghanistan, walked to his car to get his ID, followed by the officers, he heard the shot behind him, he said.
I tend to agree with  Smith that the 'we had to wrestle the knife away' is bullshit.  Hey, they've got say SOMETHING to make this idiocy seem less their fault, right?