Artyom Iskhakov told 19-year-old Tatiana Strakhova’s parents in the appalling message how her heart was still beating – so he stabbed her and then had sex with her corpse.
The 19-year-old killer then paused to eat sandwiches – boasting that several hours later he had sex with her dead body again.
Riven by envy at his ex-girlfriend’s relationship with another man, the talented IT student wrote that his actions were “terrible – but I did what I wanted”.
He then hanged himself wearing his glasses moments after finishing his post by asking forgiveness from his and her parents, and telling them where to find the bodies.
Tatiana – an A-grade student in one of Moscow’s most prestigious universities – had earlier dated Iskhakov before ditching him.
They continued to share a flat but she had other boyfriends, most recently a man called Igor from St Petersburg.
In graphic and shocking testimony about her murder and rape, he wrote: “She came home, I was sitting in the kitchen, she walked to her room.
“I punched her in the face, she fell on the floor.
“I punched her a few more times, blood started coming from her mouth, and she asked me to leave.
“I didn’t leave, LOL, I started strangling her….
“After finishing, I realised that the heart was still beating.
“I put my hands on her throat to no avail.
“Then I took a knife and cut her throat.
“I don’t know how well I did it, but there was lots of blood.
“Next I ****ed her once again and decided to write this.”
He continued: “At some point I stuffed her mouth with her tights so I didn’t see the blood and not to hear some strange sounds that her body was making.
He “also strangled her throat with a rope I had bought to try shibari (Japanese bondage) with her.”
He admitted that he then went to the kitchen and “got something to eat” – “I’ll go and make sandwiches, I will enjoy it while I can” – and slept a few hours before he had sex with her corpse “once again”.
“I loved her very much.
“You know, at this very moment I’ve realised what the **** I did.
“I feel cold and my hands have started shaking even more.”
He admitted his disgust at having sex with Tatiana’s corpse, adding: “Now I can do nothing except kill myself. ”
“I got mad because of thinking of ****ing her so much that I killed her.”
But several hours later he wrote: “What have I turned into?
“Sorry. I cannot atone for my sins.
“I’ll go kiss Tanya (Tatiana) on her cold forehead and prepare (for my death).
“There is no way back. remember something good about me at least sometimes. I did not think that everything would end like this.”
Tatiana attended the prestigious Higher School of Economics at Moscow’s National Research University.
Police are investigating the deaths.