The suspect deputies believe is responsible for the shooting was later located at a nearby home.
Following the discovery of the shooting, YCSO said they were seeking a young black male wearing a black hoodie and camo pants.
Dr. Lesslie was a prominent doctor in Rock Hill who published several books. Lesslie and his wife were married for at least 35 years, according to WLBT.
Dr. Lesslie started the Riverview Medical Center.
The person deputies believe is responsible for the shooting was found at his home on Marshall Road. Investigators have not released a motive or said whether the alleged shooter knew the victims.
Deputies said they were at the home conducting a search warrant.
Officers would not say if the suspect was alive.