Two concepts, depending on what sort of game you want to run.
Ocean's 11 type game
Concept: Wealthy day-trader who dabbles in safecracking and cat burgling, more as a thrill-seeking activity than to earn money. A true gambler, this character almost lives off his own luck.
Classes: Intruder, perhaps some Faceman, possibly Fixer or Thief if you are allowing those.
Main Ability Scores: Dex and Cha
Main Skills: Athletics, Blend, Security, Sneak, Streetwise
Feat Possibilities: The Dice are Hot, Fortunate, Fortune Favors the Bold, Ghost Basics, Spider Basics, Card Shark, Silver Tongue
Traditional law-and-order mystery type game
Concept: A police desk sergeant with an abnormally keen interest in various conspiracy theories, bypassed many times for promotions in favor of the more mentally-stable.
Classes: Sleuth, maybe some Snoop
Main Ability Scores: Int and Wis
Main Skills: Analysis, Bureaucracy, Investigation, Resolve, Search, Streetwise
Feat Possibilities: Pack Rat, Personal Stash, Tool Shed, Diplomat, Government Contacts, Private Eye, Police Contacts, Examiner, Medical Contacts