A Quick Come Back

A defense attorney was cross-examining a police officer during a
felony trial - it went like this:

Q: Officer, did you see my client fleeing the scene?
A: No sir, but I subsequently observed a person matching the
   description of the offender running several blocks away.
Q: Officer, who provided this description?
A: The officer who responded to the scene.
Q: A fellow officer provided the description of this so-called
   offender.  Do you trust your fellow officers?
A: Yes sir, with my life.
Q: With your life?  Let me ask you this then officer - do you have a
   locker room in the police station - a room where you change your
   clothes in preparation for you daily duties?
A: Yes sir, we do.
Q: And do you have a locker in that room?
A: Yes sir, I do.
Q: And do you have a lock on your locker?
A: Yes sir.
Q: Now why is it, officer, if you trust your fellow officers with your life,
   that you find it necessary to lock your locker in a room you share with
   those same officers?
A: You see sir, we share the building with a court complex, and sometimes
   lawyers have been known to walk through that room.  With that, the courtroom
   erupted in laughter, and a prompt recess was called.  The officer on the
   stand has been nominated for this year's "Best come-back" line and we think
   he'll win.