In 1893, five years after Jack the Ripper disappeared from London, someone began attacking and raping women and girls in the Swedish city of Norrköping.

He struck in the early snowy months, all over Norrköping and always after dark, alarming the city, which came to know him as Långrocken, “the Longcoat.” As many as 18 undercover policemen patrolled in women’s clothes in an attempt to trap him, to no avail.

The attacks stopped suddenly in the spring. The crimes have never been solved.