It's mephedrone, but if it does actually cause this particular behavior might be debateable. There was one case in Miami where it was suspected to have played a role, but I think that's never been proven.
From what I heard the guy was so high it took two entire magazines just to put him down, but he shrugged off every bullet like nothing @3@
After it hit the news everyone was saying it was a zombie.
Flakka and Bath Salts are terrifying. It end sup 3 ways.
Either A: You get the best high ever. or
B: Your left drooling and foaming at the mouth (pissing and shittting yourself)
or C: You become hyper violent and suddenly try to kill or eat anyone near you and act like a zombie.
Seriously this stuff is terrifying.
Just look up some people on it and see how they were, either tripping out beyond belief or hyper violent.