A YouTuber streamed the death of his girlfriend as his followers encouraged the abuse online, it is alleged.
Stanislav Reshetnikov allegedly forced his pregnant victim, Valentina "Valya" Grigoryeva, out onto the balcony of his Moscow apartment in freezing temperatures and kept broadcasting as she died. Early reports suggest that she may have succumbed to hypothermia.
According to one Russian news channel on Telegram, one of Reshetnikovs online followers had paid him $1,000 (about 820) to continue the vile treatment.
Reshetnikov, who runs a popular YouTube channel called ReeFlay, has allegedly filmed himself abusing Grigoryeva before. In one notorious clip he appeared to poured hot pepper sauce on her face.
Even after Grigoryeva lost consciousness and Reshetnikov had dragged her back into the apartment, he continued to broadcast to his thousands of subscribers, it is alleged.
On the video, Reshetnikov could be heard saying: Valya, are you alive? My bunny, whats up with you?
Valya, Valya, damn, you look like you are dead.
Bunny, come ontell me something. I'm worrying. Damn... I'm not [feeling] her heartbeat.
He then told his viewers: Guys... No pulse... Shes pale. She is not breathing.
The horrifying broadcast continued after he called an ambulance.
At first Reshetnikov appeared to regret what he had done, tearfully blaming himself for the 28-year-old womans death.
However as the stream went on he said What is there to regret? I didnt really do anything, and pointed out that he had called the ambulance himself.
Theres some confusion about how long the scantily-clad woman was locked outside on the freezing balcony, with some news reports claiming that she had been outside for hours while one neighbour told Russian news channel RT that she had only been on the balcony for a short time.
Olga Vradiy, an official at the Moscow region Investigative Committee, told reporters that inquiries have now begun to determine how the young woman died and whether anyone is criminally liable.
Activist Liza Lazerson hit out at Youtube for banning clips showing womens nipples but showing scenes of violence and cruelty against women without problems.
The woman dies on air - and the audience sends donations to the killer. This must stop.
She warned: Such videos are calmly broadcast to the whole world, meaning something is broken.
An urgent criminal investigation is now under way in the Russian capital.
If you have been affected by issues of domestic violence or coercive control you can call Women's Aid's 24-Hour National Domestic Abuse Helpline for free. The number is 800 341 900.