TODAY IN “WORKPLACE VIOLENCE:” FBI probing suspect’s recent conversion to Islam in Oklahoma beheading.

UPDATE: Stopped by “a good guy with a gun.”

Lewis confirms that Hufford was stabbed several times and that Nolen “severed her head.”

At that point, Lewis claims Nolen met 43-year-old Traci Johnson and began attacking her with the same knife.

Officials say at that point, Mark Vaughan, an Oklahoma County reserve deputy and a former CEO of the business, shot him as he was actively stabbing Johnson.

“He’s a hero in this situation,” Sgt. Lewis said, referring to Vaughan. “It could have gotten a lot worse.”

Yep.