I am really getting tired of seeing Rich Davis getting hammered over this. The amount of smoke and noise drifting over the web about the "Zylonistas" is just phenomenal, its like he's being attacked by a pack of mad dogs. Zylon may or may not be a suitable material for bullet-resistant vests, but the inference that Davis et al have engaged in some vast conspiracy to endanger the LEO community just reeks. There is FAR too much conjecture and far too little empirical data to infer that parties may be negligent or civily culpable.
Bottom line is that there is nothing in life that is %100 percent reliable. Davis took the point in an extremely volatile endevour and has led the industry in innovation and advancement. Could Zylon have been a mistake? Maybe, maybe not, but the jury is literally and figuratively out on that. Zylon vests may be total junk in the long run, but Davis still has a bunch of saves in the plus column in my book. Any loss of life is tragic, but Davis didnt pull the trigger.
Body armor is just that. It isnt bullet proof, nor does it confer invincibility. It can and will fail, just like any other device in the field.