http://www.npr.org/sections/thetwo-way/2016/11/23/503120449/...
They're even very clear as to who says what. Note, I never claimed to be providing a fact check entry. Rather, the post I was responding to requested, "Is there a news story, social media discussion, some other documentation of the incident?" The answer is, "yes, lots." Depending on where you source your news, you either heard about it a ton or heard about it none, but rarely in between.
The punctured-tanks-as-weapons theory sounds credible, and I doubt any of those protesters could properly identify a concussion grenade if they saw one (nor could most people in the general population).
That's an interesting definition of "non-lethal". "Non-lethal" in this case apparently does not mean "cannot kill the target", because bean bag rounds absolutely can be lethal when shot at someone. They're shot fast enough that they can easily damage internal organs or even fracture your skull.
> Myth: Law enforcement officers deployed concussion grenades resulting in the grievous injury to a protester’s arm.
> Fact: Law enforcement has at no time used concussion grenades during protest activities. Non-lethal munitions used include: impact sponge rounds, drag stabilizer bean bag rounds, riot control CS (tear gas) canister and water, Taser, and stinger balls, which are small rubber balls and CS gas emitted from the device. It makes a loud noise and emits small rubber balls which are meant to cause people to be startled and therefore disperse. It contains no shrapnel.