Nurse charged with capital murder after he 'intentionally injected air into ...

Former Texas nurse William Davis was indicted on a capital murder charge 

Former Texas nurse William Davis was indicted on a capital murder charge 

A former Texas nurse already charged with murder following the suspicious death of a patient faces an additional charge of capital murder. 

William George Davis was previously indicted in June for one murder and two aggravated assault charges. His charges were amended this week to include one capital murder charge and three aggravated assault counts.

Davis, who worked at Christus Mother Frances Louis and Peaches Owen Heart Hospital in Tyler, is accused of tampering with the IVs of at least seven patients resulting in the death of at least one. 

Authorities say Davis intentionally injected air into catheters inserted into the arteries of patients recovering from heart surgery. One patient, Christopher Greenaway, died. Two others, Pamela Henderson and Joseph Kalina, were left in vegetative states. 

Davis, 34, was fired from Christus Mother Frances in February, weeks after hospital officials reported a number of suspicious deaths involving patients recovering from heart procedures. 

He was arrested in April after police learned that Davis was the only employee consistently around each of the patients and surveillance video showed him entering and leaving their rooms moments before the patients experienced stroke-like symptoms. 

Christopher Greenaway died on August 6

Christopher Greenaway death

Davis is accused of intentionally tampering with patients' IVs causing the death of at least one patient, Christopher Greenaway (pictured), and leaving at least two others in vegetative states 

According to reports, Davis was not the assigned nurse for the patients. 

The Tyler Morning Telegram reports that the first incident took place in June 2017 when a 61-year-old man experienced 'a profound and unexplainable incident resembling stroke-like symptoms'.  

Less than a month later another patient, a 58-year-old man, suffered similar symptoms. 

On August 2, Greenaway was admitted to the hospital and received a coronary artery

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