(CNN) A man faces a charge of capital murder in the shooting of 7-year-old Jazmine Barnes, who was killed as she rode in a car with her family in Texas.

Investigators identified Eric Black Jr., 20, as a suspect based on a tip. He was arrested and has admitted to taking part in the shooting, the Harris County Sheriff's Office said in a statement.

"Investigators are continuing to pursue evidence that could possibly lead to other suspects being charged in this case," the statement said. "At this time, investigators do not believe Jazmine's family was the intended target of the shooting, and that they were possibly shot as a result of mistaken identity."

Barnes was riding in a car with her mother, LaPorsha Washington of Houston, and three sisters on December 30 about 7 a.m. when a man drove up next to their vehicle and opened fire.

Jazmine was fatally shot in the head.

Read More