Well, he might of been on a really serious call. Trying to get someplace in a hurry to back up a fellow Officer.
And you were small fish in comparison to the big fish that maybe needed to be caught.
He might of saw what you tried to do, and knew the fact that when you saw who he was... that you knew you were caught and didn't want any more of his attention.
Probably better that way.
Hehe.