An Austin PD officer was very seriously injured, by a suspect who grabbed the officer’s fixed-blade knife from its sheath, which was mounted the front area of the duty belt rig. Very nearly died, as I remember it.
I had already been advising my rookies to keep their knives positioned with safety in mind, and this APD incident provided a local, cite-able example.
I believe that the main reason Houston PD cracked-down on external “tactical” armor, worn by patrol officers, was because officers were wearing magazines, knives, and such, “AT” people. External Level III armor had been specifically allowed, for patrol officers, in the wake of the BLM-related terrorist incidents, but then, the rule was modified so that donning such armor was limited to specific situations. (I actually kept wearing my plates, as they were not adorned with anything more than a radio holder, on a side panel, and one night, when I backed-up the chief, who had stopped a suspected drunk driver, he had no problem with my discreetly-worn plate carrier.)