Heiji's grin widened. "Ain't it obvious? Murder cases, of course. I'll chase down bad guys and make 'em properly pay for their crimes! But of course I won't turn down other kinds. Missing persons, kidnappings, corruption cases, that kinda thing."

Wait a second. "You've never heard of Hercule Poirot? He's a character created by Agatha Christie -- a Belgian detective who's real particular."