The flat stank before the police even pushed the door open. Neighbors had been complaining for days, and the caretaker was the one who finally said what everyone was thinking: it smelled like a dead body. Stefano Brizzi answered the door in pink Speedos and aviator sunglasses. He wasn’t nervous.
He barely waited for a question. “I killed a man last week,” he said. “Satan told me to do it. He kept telling me, kill, kill, kill.
”
The officers were ordinary beat cops. Nothing in their training prepared them for what was inside. Gordon Semple was 59 years old and had spent nearly three decades as a police officer in London. He worked in an antisocial behavior unit, ran marathons, raised money for charity.
His family described him the way you’d describe an old-style British bobby: kind, caring, dependable. He lived with Gary, his partner of 25 years. They had an open relationship, and by all accounts, they were happy. On April 1, 2016, Gordon left home for a meeting at the Shangri-La restaurant in the Shard.
He finished around half past twelve. He messaged a man he’d been talking to on Grindr and agreed to meet at his flat in Southwark. CCTV caught him walking along Great Guildford Street. That was the last time anyone saw him alive.
Gary tried calling him that evening. He tried again and again. Gordon never answered. It was so out of character that Gary called the police the same night.
Because Gordon was an officer himself, the case was treated seriously from the start. Facebook groups sprung up. Thousands of people joined, all looking for him. The Metropolitan Police’s homicide and major crime unit took over.
The man waiting for Gordon that afternoon was Stefano Brizzi, a 49-year-old Italian computer programmer who had once worked at Morgan Stanley. He was intelligent and well-educated, raised in a devout Catholic household in Tuscany. He realized early on that he was gay but kept it a secret for years. When he came out, his family rejected him.
He carried the shame with him. He moved to London in 2012, built a respectable life, and quietly fell apart. He was diagnosed with HIV and hepatitis C, and he described those diagnoses as punishment from God. He started using crystal meth.
By 2015, he lost his job. He drifted into chemsex parties, arranging them through dating apps, chasing brief moments of validation that never lasted. On April 1, Brizzi invited Gordon to his flat for what he described as a chemsex party. He had arranged for two other men to come later.
At some point before they arrived, he and Gordon had sex. Then Gordon died. Brizzi later claimed Gordon died from erotic asphyxiation, a sex game gone wrong. But at 7:00 p.
m. , when one of the invited men knocked on the door, Brizzi’s reaction didn’t match that story. He sounded stressed but not panicked. He told the man someone had fallen ill and the party was off.
The man heard something in the background that sounded like vomiting, but he left without thinking much of it. Over the next few days, Brizzi tried to make the body disappear. He bought chemicals, tools, and buckets from a local DIY store. CCTV caught him putting a bucket on his head, morbidly checking if it could fit a human head.
In his flat, he filled the bathtub with a blue-green caustic substance and tried to dissolve body parts. It didn’t work. So he moved to the kitchen. He tried cooking parts of the body.
He used a grater on flesh until it wouldn’t work anymore, then went out and bought bigger grills to keep going. He flushed pieces down the toilet. He put bones in bin bags. He threw a foot or leg into the Thames.
Investigators later found bite marks on some of the bone fragments and speculated that in his desperation, he may have consumed parts of the body. He had a copy of The Satanic Bible in the flat, with notes about himself in the corners. He wrote about being torn between light and darkness, about a war within himself. He described the moment he surrendered to the darkness.
When the neighbors started noticing the smell, Brizzi burned scented candles in the hallway. The man upstairs asked him about the odor. “Just cooking for a friend,” Brizzi said. The neighbor wasn’t convinced.
He called the police. When officers arrived, Brizzi confessed almost immediately. He told them he’d been in contact with Satan, that Satan had ordered him to kill, and that Gordon was the opportunity. But once he was in a police interview room, under caution, his story changed.
He stopped talking about the devil and started talking about sex games. He said Gordon died accidentally during erotic asphyxiation. He insisted the death wasn’t intentional, though he admitted to disposing of the body. The forensic examination took nearly two weeks.
Chemical experts made the scene safe before investigators could even enter. The bathtub was full of caustic liquid and floating fat. Blood and tissue were splattered across the windows and floor. The oven and blender contained traces of DNA.
The drainworks had to be pulled apart because flesh had been flushed through them. Digital forensics established the Grindr messages between Brizzi and Gordon, reconstructing how two strangers connected and ended up in that flat. The timelines showed everything: the first message, the arrangement, Gordon walking to the flat, and what happened after. In October 2016, Brizzi stood trial.
He pleaded not guilty to murder, sticking to the story that it was a tragic accident during rough sex. The judge rejected the defense. Even if the death began as an accident, the court noted, Brizzi continued the violence far past the point where Gordon lost consciousness. And his behavior afterward demonstrated clear intent.
He didn’t call for help. He didn’t call the police. He went shopping for chemicals and tools and spent days systematically destroying the evidence. He was convicted of murder and sentenced to life in prison with a minimum term of 24 years.
He was held at Belmarsh prison. In February 2017, he was found dead in his cell. A coroner concluded he had taken his own life. Gordon’s family set up a Facebook group after he went missing.
Within days, thousands of people joined. His niece described him the way everyone did: a much-loved brother, partner, uncle, and cousin. A man who would do anything for anyone. Kind, considerate, and always ready to help others.
The same technology that allowed a predator to find his victim also helped the police catch him. But none of that brought Gordon back. The last thing he ever did was walk down a London street, under gray skies, toward a man he barely knew.
