Imagine you're a homicide detective working on the biggest case of your career when out

of the blue someone hands you an envelope.

There's no return address on it and you weren't expecting mail, but you open it anyway.

Inside is this postcard, addressed with letters cut out from a magazine.

It's from the man you've been trying to catch for a while now.

You don't know his name or what he looks like.

For all you know, he handed you the envelope.

But you know it's him because there's something else inside too.

Rapped in tissue paper is a piece of human breast tissue from his latest victim.

He's toying with you, essentially saying, guess what?

You'll never catch me.

This is the story of the monster of Florence.

Italy's most famous and gruesome serial killer.

I'm Ashley Flowers and this is International Infamy, a Spotify original from Parkcast.

I'm taking you around the world to look at 15 culture defining crimes from 15 different

countries.

Today, we're stopping in one of Italy's oldest cities to talk about the monster of Florence,

one of the grisliest serial killers ever to live.

The story is filled with so many twists and turns.

It'll make your head spin.

16 people dead, a 40 plus year man hunt, 100,000 suspects interviewed.

I could easily spend a season pouring over the ins and outs, but I'm going to try to cover

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