This series is a few years old, but I just found them -- I speak of W.E. (or Wally, depending on which edition you have) Davis' Gil Beckman detective series. Beckman is a wise-cracking former cop who works security at a California amusement park, with the typical hot-and-cold relationships with the local cops whenever tragedies strike at the park. He is also a widower, so his sensitive side is never far from the surface.
The books are pretty funny, most of the violent action is off-screen, and they are a pretty quick read.