this suicide by cop death made me wonder why can't they shoot whoever is challenging them, with a trank dart. or whatever.. ?  we certainly should be able to create a projectile that has a dose of knock out drug. why are we shooting to kill? always? i know there are instances that this all pops off so fast, there is little time for strategy ... but many other cases are like mr vaughns, where the intensity gets racheted up... 
 and this is  a fairly common occurrence nationwide.  unfortunately.