Serving the public

A police officer, though scheduled for all-night duty at the
station, was relieved of duty early and arrived home four hours
ahead of schedule, at 2 in the morning.
Not wanting to wake his wife, he undressed in the dark, crept
into the bedroom and started to climb into bed. Just then, his
wife sleepily sat up and said, "Honey, would you go down to the
all-night drug store on the next block and get me some aspirin?
I've got a splitting headache."
"Certainly, honey," he said. Feeling his way across the dark
room, he got dressed and walked over to the drug store.
As he arrived, the pharmacist looked up in surprise, "Say," said
the pharmacist, "I know you - aren't you a policeman? Officer
Fenwick, right?"
"Yeah, sure. So?" said the officer.
"Well what the heck are you doing all dressed up like the Fire
Chief?"