If you were a security guard at a national retail chain and you crossed paths with a customer looking to gain a five-finger discount, you'd likely start barking out orders-- something along the lines of "stop!" or "thief!" or "put your hands where I can see them!"

And that's exactly what happened last week, when local Wal-Mart employees stumbled across a transient who was trying to make off with some loot.

The shoplifter, 24 year-old Roxanne Melonzon, decided to bite back, and not in the figurative sense.  She literally bit one of the security officers who caught her red handed.

A spokesperson …