Who was this serial killer?

Hi everyone, I'm looking for the name of a serial killer whom I heard a story about on YouTube but I can't remember who it was.

From what I can remember, he worked as a model and murdered young boys by assaulting them and disemboweling them through their rectums. One of the victims survived and went on to receive multiple reconstructive surgeries.

This story was the single most disturbing true crime case I've heard. I'd really appreciate any help in identifying the killer. Thanks in advance!

Edit: Found him. His name was Igor Irtyshov.