Police description

A policeman came up to me while I was walking through the park earlier

"Excuse me, sir" he said, "I'm searching for a man; he's wearing a tracksuit, got a beard, about 5'10 - have you seen anyone matching that description?"

"No I haven't" I replied, "I'll keep an eye out though,

Spoiler:

can't be many around with a beard that long."