"Roses are red,
Violets are blue,
Sugar is sweet,
I'm gonna break your face."

Classic stuff from the TV series.

And the film? Frank Drebin going looking in a folder at the station:
Frank: Hey! The missing evidence in the Kelner case! My God, he really was innocent!
Ed: He went to the chair two years ago, Frank.
Frank: Well, uh...
He quickly shoves the evidence back into the file cabinet.