A Texas nurse has been found guilty of the murder of four patients who died after he injected them with air following heart surgeries.
William Davis, 37, was convicted of capital murder by a US jury on Tuesday and could now face the death penalty.
Prosecutors said he targeted seven people from June 2017 to January 2018.
Christus Mother Frances Hospital, where the attacks took place, said it hoped that the jury's verdict helps bring some closure to those harmed.
The men, aged between 47 and 74, experienced seizure-like symptoms and died from fatal brain damage after the air was injected into their arterial lines.
The court heard that the four men killed by Mr. Davis had initially been recovering well from their operations and that doctors had been at a loss as to how their conditions had deteriorated so rapidly.
Authorities said it was only when doctors saw CT scans that showed air in the patients' brains that they realised something was amiss.
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