My concept so far (based mostly on a vampire mafia):

[hider=Camilla]
Camilla is a vampire and former associate of the shadowy [i]Insert Vampire Mafia Name Here[/i].

Embraced little more than a decade ago, Camilla is young for a vampire, but she has adapted quickly to life as a creature of the night. A criminal in her life and unlife, Camilla would still have quite the rap sheet, had her sire not greased the right palms soon after her embrace. Years of intimidation, violence, and crime saw Camilla rise from street corner rat to bonafide enforcer before she ran afoul of her sire.

Branded a traitor and cast out into the cold, Camilla is desperately trying to survive in a hostile city without the protection of her sire or coven. The young vampire knows all to well that it is only a matter of time before old enemies find her and take advantage of her precarious position.
[/hider]
TL;DR: Police Woman turned Vampire Mobster

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As it's Friday though, not sure I'll get much done tonight (must dance, drink, and be merry).