LOUISVILLE, Ky. (WDRB) -- A Louisville Medical Technician has admitted to murdering an elderly patient.

WDRB has learned 36-year-old David Satterfield was just sentenced to spend 25 years behind bars. He pleaded guilty to killing 86-year old Marcelline Vale.
She died in 2007 from an insulin injection, but had no medical reason for the injection. 

Satterfield worked as a medication technician at Parkway Nursing and Rehab Center on Eastern Parkway when Vale and two other patients were found with critically low blood-sugar readings. Vale died the following month. A second, 82-year-old woman also passed away, and a third woman recovered.

According to police, in 2014 Satterfield stated: "I killed this woman (Vale) and I want to admit it to you."

The Kentucky's Attorney General's office just announced Satterfield's guilty plea.

Satterfield also acknowledged in his plea that he injected two other patients with insulin...and that he had no medical reason to do so.

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