Little Johnny again

Little Johnny's kindergarten class was on a field trip
to their local police station where they saw pictures
tacked to a bulletin board of the 10 most wanted
criminals.

One of the youngsters pointed to a picture and asked if
it really was the photo of a wanted person.

"Yes," said the policeman. "The detectives want very
badly to capture him."

Little Johnny asked, "Why didn't you keep him when you
took his picture?"