What makes a killer contains graphic details of sexual assault and violence and is not intended

for all audiences. Listener discretion is strongly advised.

April 7, 2016. Police are called to the Peabody Estate in South London after receiving complaints

from tenants about a putrid smell. He got the letter box and he said, can you spot it now?

And I'll say to him, do you know where it smells like? It smells like a dead body.

The two police officers knock on the door of 49-year-old Stefano Breetz's apartment.

He greets them with an alarming statement. He said, I've killed a police officer.

Satan told me to do it. I promised Satan that I would kill her the first opportunity.

And awaiting them inside was a gruesome sight.

They go into the bathroom and the bath is full of globules of fat and they find remnants of the

body. The body belonged to 59-year-old police officer Gordon Semple.

The officers would soon find out that Semple had met his killer while using a dating app.

They were essentially both looking for somebody to hook up with and have sex with.

And the speed at which this happens, which they meet, with which Gordon Semple loses his life

really is quite incredible. This is what makes a killer, a series that chronicles the lives

and crimes of the world's most notorious killers. I'm your host, Jennifer Natozo.

In every episode, we'll trace a killer's origins, examine their behavior,

and follow their path to bloodshed. In this episode, we'll discuss Stefano Breetz.

Stefano Breetz was born into a devout Catholic family in San Marcello de Pisto Yezzi in the Italian

region of Tuscany on June 26, 1966. He was aware of his sexuality from an early age,

according to former criminal psychologist Chris Carter and author Jeffrey Wonsull.

He knew he was an almost like show, but Breetz also knew he was a Catholic, and they're not only

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