After a series of testimonies, repeated psychological assessments and an experiment on pigs, neurologist Ivan Radan stands accused of four counts of manslaughter, having initially faced six counts of murder.
The news that a Ljubljana Neurological Clinic doctor allegedly hastened the death of a terminally-ill patient with a deadly cocktail of drugs in late 2014 first broke in January 2015.
The ensuing criminal investigation indicated that seven more of his patients had died in suspicious circumstances between September 2012 and December 2014.
What all of the patients had in common was that they were gravely ill and in the final stages of their lives so the doctors decided not to continue with active treatment.
Radan allegedly administered to them larger doses of mostly morphine, as well as propofol, and in the last case morphine and potassium chloride.
The prosecution initially alleged that Radan murdered six of his patients out of a desire to kill, a categorisation based of the opinion of the court-appointed clinical psychologist Aleš Friedl.
Friedl stated that the defendant had a narcissistic personality disorder and a superiority complex, an assessment that he abandoned after his colleague Alenka Sever offered a reverse assessment.
The Ljubljana District Court also commissioned an opinion from Austrian forensic expert Wolfgang Kröll, who was unable to confirm that Radan was responsible for his patients' deaths.
Kröll noted faulty documentation for the final moments of the patients' lives, but told the court that the doctor had treated his patients in line with medical standards.
The prosecution withdrew two of the six murder charges after Mateja Lopuh, a palliative care expert, assessed that the morphine levels in two of Radan's patients were not high enough for her to confirm they hastened her death.
Lopuh, who was called to the witness box by the prosecution, did emphasize though that some of the patients died suddenly as their vital functions before that had not suggested they would.
Radan, who denied all the charges against him, claimed that he had ordered a potassium drip be set up for his last patient but that potassium never reached him because he set up a bypass on the drip.
Lopuh demonstrated to the court that such a bypass was impossible to set up, but Radan countered that she did not use the same model of the drip as him.
Radan claimed that his actions were meant as a provocation to draw attention to the poor communication between the employees at the intensive care unit of the Ljubljana UKC Neurology Clinic.
Unlike Kröll, Lopuh assessed that potassium would not stop heartbeat immediately, and that electric impulses could still be read on an ECG.
In a bid to resolve the dilemma, an experiment was conducted on pigs abroad and recorded by Kröll.
He told the court that an ECG reading of the death of a pig which bled to death but was not given potassium was similar to the one recorded at the death of the 83-year-old patient whom Radan allegedly gave potassium.
After Kröll presented his arguments again at the final hearing, the prosecution changed charges from four counts of murder to four counts of manslaughter, which carries between five and 15 years in prison.
Radan also faces charges related to photographing his patients without their permission and charges of abuse of controlled substances as well as charges of abuse of office and document falsification.
He is alleged to have fraudulently prescribed himself and 11 other people EUR 20,000 worth of medication. His brother admitted that Radan had given him propofol once because they conducted an experiment.
The trial featured several bizarre events, including judge Martin Jančar inviting the Austrian expert witness Kröll for a dinner during the trial, and calling on the prosecution and defence to join them.
Prosecutor Katarina Bergant objected to such a dinner, and she turned down an offer from Kröll to join him in writing a book about the Radan trial.
After one of the hearings, expert Lopuh said she received a phone call from a man commenting on her testifying and threatening her. She was also sent photographs of a man holding a puppet in his hands.
The phone call was found to have come from the phone of a friend of Radan's.
Even before the trial started in January 2015, the so-called euthanasia scandal led to the sacking of the heads of the Neurological Clinic's intensive therapy department and intensive care unit.
The scandal also prompted the council of the Ljubljana UKC hospital to dismiss Erna Kos Grabner as the hospital's head nurse and initiate dismissal of medical director Sergej Hojker. They both resigned.
