Stefano Brizzi killed PC Gordon Semple, 59, after they met through the gay dating app Grindr for drug-fuelled “hot dirty sleazy” sex on April 1.
Following a trial at the Old Bailey, a jury found the 50-year-old guilty by a majority of 10 to two after 30 hours of deliberation.
Brizzi will be sentenced on Friday, December 9.
The pair had met on gay dating app Grindr and arranged a ‘hot dirty sleazy session’ at Brizzi’s central London flat in April.
Brizzi claimed PC Semple, 59, died when a dog leash he was wearing slipped, strangling him, but a pathologist concluded it would take minutes rather than moments as the defendant claimed.
After the killing, the crystal meth addict was seen buying buckets, a perforated metal sheet and cleaning products, and he then set about dismembering the body.
Police attended the flat after neighbours complained about a smell, and officers found ‘globules’ of flesh floating in the bath, bags of bones and part of PC Semple’s head, and pools of human fat in the oven.
Following his arrest, Brizzi admitted killing and trying to dissolve the body of PC Semple, of Dartford, Kent because ‘Satan told me to’.
The former IT developer told police that he had ‘chucked’ some of PC Semple’s body into the Thames and thrown away his police badge and belongings.
He told jurors that PC Semple died in a ‘state of erotic bliss’.
His lawyer, Sallie Bennett-Jenkins QC, insisted he was no ‘monster’ and could not have eaten PC Semple’s flesh as it was covered in chemicals.
PC Semple’s brain and other internal organs have never been found.