Renegade Guardsman NPC Build

[Lazaryus]

I want to add a unique character to a city guard. They would have two identities: one is that of a normal guard that does everything by the book, while the other breaks all protocol and just staight up kills criminals on the spot. I was thinking about doing gestalt.

Any suggestions?

[Lelomenia]

Vigilante? Are his coworkers aware of both sides of his behavior? Edit: even if they know, Vigilante is probably a good way to go as it lets you run two alignments depending on which identity is being used.