Between February 2 and last Thursday, three people were violently thrown into icy water. Two women in their sixties and a man, Pierre, 73, were thrown into the cold waters of this urban lake by a stranger.

Pierre is the last victim of the mystery attacker. “I have been walking for an hour on the banks of the lake every day for fourteen years. I had never experienced this, says this former campsite manager. I'm just afraid there will be more attacks," he says.