Karen Tracy
Lieutenant Karen Tracy was a medical technician aboard the  under the command of Captain James T. Kirk. 

In 2267, Tracy transported down to the home of Prefect Jaris on Argelius II to conduct a psycho-tricorder scan on chief engineer Montgomery Scott to determine whether he really had killed  or not. 

Shortly after accompanying Scott into a chamber, she was stabbed to death by the entity known as Redjac. ()

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Humans
Starfleet sciences personnel
USS Enterprise (NCC-1701) personnel
Medical practitioners