I'd be interested if the guy is working for another company doing loss prevention or if he's another shopper going after shoplifters.

I'm not a lawyer but there could be harassment charges (or a suit) against the guy.

Here's the LiveLeak page where the video was posted.

From the OP

Id just like to say this. Before confronting a shoplifter please make sure you are 110% sure the person is actually attempting to commit a crime. Lol. I am well trained in loss prevention and have caught, detained or have had prosecuted over 200 little bitches just like this one. 

Doing this type of thing could be dangerous. So please be ready to upper cut someone if they pull out a weapon. .

I'm gonna say he does loss prevention

Either way, he could have made a citizen's arrest. As a citizen, you do have the power to detain a person who is committing a crime in your presence. but I wouldn't really encourage it

fun fact: in several states its not illegal to steal livestock..... IF your eating it. It becomes a civil case, not a criminal one.

Wow.... that guys hardcore.

wow.