Killer nurse gets death penalty for killing four patients with air

‘Turns out a hospital is the perfect place for a serial killer’: Male nurse, 37, is sentenced to death for murdering four patients ‘for fun’ by injecting them with air

  • William George Davis, 37, has been sentenced to death for killing four patients after he injected them with air for fun 
  • He worked in the cardiovascular ICU wing at Christus Trinity Mother Frances Hospital in Tyler, Texas when he killed four patients between 2017 and 2018
  • Christopher Greenaway, 47; Jose Kalina, 58; Ronald Clark, 68; and John Lafferty, 74, were recovering from heart surgery when they became Davis’s victims 
  • Davis injected air into their arteries and CT scans showed stroke-like symptoms and fatal brain damage
  • He was convicted of the capital murders exactly one week ago
  • Prosecutors portrayed Davis as a twisted serial-killer caregiver who ‘enjoyed’ injecting air into vulnerable patients when no one was watching  

A serial killer Texas nurse has been sentenced to death for killing four patients after he injected them with air for fun following their heart surgeries. 

William George Davis, 37, worked in the cardiovascular ICU wing at Christus Trinity Mother Frances Hospital in Tyler, Texas – about 100miles east of Dallas – when he killed four patients between 2017 and 2018.

The Smith County jury, which was made up of 12 jurors, deliberated for just under two hours before deciding to condemn the ex-nurse to death. 

According to the Tyler Paper, the jury believed David could be a threat to society and found that there is no evidence that would have stopped them from making their decision.


Serial killer Texas nurse William George Davis (left and right in court on October 19), 37, has been sentenced to death for killing four patients after he injected them with air for fun following their heart surgeries

The sentence was announced by 114th District Court Judge Austin Reeve Jackson a week after Davis was convicted of the capital murders of Christopher Greenaway, 47; Jose Kalina, 58; Ronald Clark, 68; and John Lafferty, 74.

Davis – from Hallsville, Texas – was found guilty of the horrific killings on October 19 after he injected air in the victims’ arteries as they were recovering from their heart surgeries.

Doctors were puzzled as the patients’ conditions deteriorated after surgery. CT scans showed air in their brains and they reportedly suffered from unexplained neurological problems, according to The New York Times.

Doctors cited stroke-like symptoms and said that Davis was the only nurse on duty at the time. 

‘It turns out a hospital is the perfect place for a serial killer,’ Smith County district attorney Jacob Putman said during the trial.

Earlier on in the trial, which began on September 28, Putman said during opening statements: ‘No one expects this is going to happen to them – certainly not in a hospital.


Christopher Greenaway (left) and Joseph Kalina (right) were two of four victims whose arteries were injected with air. CT scans showed the air in their brains and they reportedly suffered from unexplained neurological problems

‘We’re going to ask you to find him guilty of capital murder because that’s what he did.’ 

Over the course of the next month prosecutors showed security footage from the hospital in the courtroom throughout the four-day punishment phase, which began the day after he was found guilty on October 19.

The videos showed Davis entering one of the patient’s hospital rooms. That patient’s heart monitor alarm sounded three minutes later and he died, as reported by The Times. 

Then on Friday a phone call Davis made to his ex-wife from jail was also played. The killer said he tried to find ways to prolong patients’ ICU stays so that he could work overtime and make more money.

After admitting to the slayings to his ex-wife he also reportedly berated the jury – which was made up of five white men, one Hispanic man and six white women – to his brother.  

Prosecutors reportedly portrayed Davis as a twisted serial-killer caregiver who ‘enjoyed’ injecting air into vulnerable patients when no one was watching and thus causing fatal brain damage.

‘(He) liked to kill people,’ prosecutor Chris Gatewood said during closing arguments. 

‘He enjoyed going into the rooms and injecting them with air. If you watch the video on (Joseph) Kalina, he sat at the end of the hall and he watched those monitors and he waited. That’s because he liked it,’ Gatewood added.  

Davis was a nurse at Christus Trinity Mother Frances Hospital (pictured) in Tyler, Texas – about 100miles east of Dallas – at the time of the horrific slayings

Meanwhile, defense attorney Phillip Hayes told the jury that the hospital had issues and that Davis was a scapegoat who was only charged because he was there when the deaths occurred – but jurors disagreed. 

Hayes claimed that the deceased patients all showed signs of a watershed stroke – which occurs when vulnerable border zones of the brain supplied by the three main cerebral arteries don’t receive enough blood, according to The Times.

He also noted that they each had underlying medical conditions and suggested that Davis was merely in the wrong place at the wrong time.

‘I don’t know if there’s any evidence to show that it was foul play,’ the defense attorney said at the trial. 

Putman noted that the hospital has yet to even change any of its procedures but hasn’t had any similar incidents since Davis left. 

Davis remains in custody at the Smith County jail on a $8.75million bond, according to The Times.

Putman said after Wednesday’s sentencing trial when asked about why the jury only took two hours to reach a decision: ‘I don’t know why they deliberated a short amount of time but if I had to guess it would be the case that the detectives put together was so strong. It didn’t leave a doubt in their mind.’

Prosecutors showed security footage from the hospital in the courtroom throughout the four-day punishment phase, which began the day after he was found guilty on October 19. The videos showed Davis entering one of the patient’s hospital rooms and that patient’s heart monitor alarm sounded three minutes later

Prosecutor Jacob Putman (pictured) noted that the hospital has yet to even change any of its procedures but hasn’t had any similar incidents since Davis left. During opening statements on September 28 Putman asked the jury to find Davis guilty of capital murder

A spokesman for Christus Mother Frances Hospital, where Davis worked, said in an email statement today, according to The Times: ‘The jury’s decision brings with it a range of emotions for our associates and – most especially – the people and families harmed by Will Davis.’

‘We pray for our community and all involved, and hope that the jury’s verdict helps bring some closure to those harmed,’ it added, noting that the hospital’s top priority was to ‘extend the healing ministry of Jesus Christ’.

Davis was fired from his job at the hospital in February 2018 and was arrested that April after police learned that Davis was the only employee consistently around each of the four patients who experienced stroke-like symptoms. 

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