DRAGNET?

How do you get thirty policeman to go for a swim? You send one of them running across a frozen lake in pursuit of a robber. Well in Hungary you do, anyway.
In Sziglilget in West Hungary, Policewoman Ani Kosut was chasing a robber across a frozen lake when she fell through the ice. Help was, of course, summoned immediately but, as the newly arrived policemen tried to fish her out, they fell in as well and even more officers had to be called.
Thirty policemen ended up in the freezing waters before a team of fire fighters finally dragged them all to safety.
And, to add insult to injury, they didn't catch the robber.
