Killer nurse says: I'm evil. I'm going straight to hell
He's a nurse, tasked to care for the sick and infirm.
But instead of carrying out his duty, he killed his patients in cold blood - and looked on as they breathed their last.
This is not a horror flick but reality.
The crimes took place at Stepping Hill Hospital (pictured below) in Greater Manchester, England, in 2011.
During that time, two patients were found dead. Many others were poisoned. One suffered brain damage.
Filipino nurse Victorino Chua, 49, had gone on a killing spree for reasons that - till now - are only known to himself.
He poisoned patients' saline drips by injecting them with insulin and watched mercilessly as his helpless colleagues fought to save them.
This happened while the father-of-two was working in two wards at the Stockport hospital in June and July of 2011.
Today (May 19), after one of the most complex investigations ever launched by the Greater Manchester Police, British media reported that Chua was found guilty of murdering Ms Tracey Arden, 44, and Mr Derek Weaver, 83. He had also poisoned 20 others.
Ms Arden, who had multiple sclerosis, was admitted for a mild chest infection and was expected to recover quickly.
She died eight hours after admission - after being treated with a saline ampoule contaminated with insulin.
83-year-old victim in agony
Another patient, Mr Weaver, was also admitted with a chest infection.
He "appeared to be in agony, eyes rolling back in his head" after insulin was injected into his saline drip.
Mr Grant Misell, 41, has been left with brain damage as insulin overdoses starve victims’ brains of oxygen.
Chua (pictured below) was cleared of a third murder.
The jury at Manchester Crown Court deliberated for 11 days and eventually ruled that the third death was caused by the patient's own cancer.
Besides poisoning the saline drips, Chua also sabotaged prescription charts by increasing the doses to dangerous levels.
After he was arrested in January 2012, a handwritten letter was found in his home, revealing his state of mind then.
Apparently, the father of two was fully aware of how heinous his crimes were.
Describing his letter as a "bitter nurse confession", Chua wrote about how the "devil" inside caused him to be "an angel (who) turned into an evil person".
That was why he was "going straight to hell".
WATCH: Killer nurse being interviewed by police
The massive investigation into the Stepping Hill Hospital deaths, amed Operation Roxburg, cost a few million pounds.
It took police three and a half years to complete.
After the verdict was reached today, Greater Manchester Police's detective superintendent Simon Barraclough said:
"Hidden in plain sight and using unsuspecting colleagues to carry out his sinister plan, Victorino Chua deliberately poisoned and murdered those who were under his care - and those who were at their most vulnerable and most in need of help.
"He would then watch the fruits of his labour unfold, as absolute chaos ensued across the wards as colleagues fought to save patients whilst attempting to comprehend what was happening."
Another senior police officer said that Chua was a narcissistic psychopath who clearly enjoyed what he did to his victims.
For his crimes, Chua is facing life in prison.
Sources: BBC News, ITV News, Daily Mail, YouTube