Two people were declared dead at the scene, he said. Several others were injured, though he did not specify how many, and transported to hospitals.

Image Roger Self was booked on two counts of first-degree murder. Credit... Gaston County Sheriff's Office

Sheriff Alan Cloninger of Gaston County said Katelyn Self, a 26-year-old deputy at the jail who had been with the office for four years, was killed. She was not on duty at the time of the crash, he said.

“This young lady started out as a detention officer, worked her way up to deputy,” Sheriff Cloninger said.

“Tragic, tragic loss of life,” he continued, appearing to be on the verge of tears. “All I’d ask is for the people to keep the family in your prayers, and also this sheriff’s office, because we’re suffering a little bit right now.”

Chief Ellis said Mr. Self is Ms. Self’s father. The Charlotte-Mecklenburg Police Department said on Twitter that the episode appeared to be “domestic related.”