The PD could go to any hardware store, Lowe's, Home Depot, or Harbor Freight Tools and buy a chop saw for under $100. They didn't "need" Benchmade to do this. Which means Benchmade was a willing participant, although I'm sure they (Benchmade) wish the PD hadn't publicized it.
New twist: I'm not sure Benchmade actually destroyed those guns.
Hawkmoon's post (quoted above) triggered a memory of idiots chop sawing AR'sand made me think it's more involved than just cutting it up. So I googled "Federal Law on destruction of firearms" and was helpfully linked to the ATF page which states:
How to Properly Destroy Firearms
What are ATF’s Acceptable Destruction Procedures?
Use an oxy/acetylene torch (not band sawed)
Must remove at least ¼ inch of metal per cut
Must be made at angles and completely sever the receiver in at least 3 critical locations (specified by model)
Acceptable method of destruction is to completely melt (smelt), shred or crush the firearm receiver. These torch cuts are acceptable alternatives to shredding.
Must pass through the forward wall or barrel mounting area
Must pass through the rear wall
Must pass through an area having a critical fire-control-component mounting pin and/or the slot in which the operating handle reciprocates
An unserviceable firearm is not destroyed and is still regulated as a “firearm” under Federal law. Any method of destruction must render the firearm so that it is not restorable to firing condition and is otherwise reduced to scrap
(Red mine, bolding original)
Those pics show a worker using a plasma cutter on the firearms. Now, I've used a bunch of different plasma cutters, but I've never seen one with a handheld torch that had a 1/4" kerf width. That's why you use a torch, so you can put a big nozzle on it. I suspect that Benchmade ran a ~50 amp plasma cutter across the guns a couple times, which took out 1/16"-3/32" of metal per cut. Maybe they got the front and back walls like they were supposed to, maybe they didn't. Then the PD took the [not actually destroyed] firearms and dropped them off.....somewhere? It's be pretty interesting to FOIA request the records of where those receivers went exactly.
Typical leftists, then. Sure they are doing the "right" thing, don't bother to actually comply with the laws.