They probably underestimated the old short guy, thinking would surrender. Give me gloves and a telescopic baton and I would defuse this guy, but chances are have to beat him half dead

Guy holds the knife backwards for slashing so has less reach. Aiming the closest target would be the head and least risk to miss, controlled overhead or side slash to the forehead, temple with the baton. Or a lunge thrust to the throat, chest, solar plexus, can be used also defensively from backpedaling.
But all these techniques are leathal and police shouldn't use it.
U can watch all this knife vs baton on youtube with their fancy moves, it's all nonsense going that close to a knife wielder. Baton has more reach so use it. And u don't need to be an expert for it.
Well the best option is still just shot the guy
