Tracy Haynes, 17, was booked into Dallas County Jail at 9:32 p.m. and is facing a charge of aggravated assault mass shooting. The arrest came after four students were injured in a school shooting Tuesday afternoon, about a year to the day when gunfire erupted on the same campus.

Dallas police responded just after 1 p.m. to a shooting incident reported at Wilmer-Hutchins High School, located at 5500 Langdon Road. One student told CBS News Texas that she heard seven gunshots. Authorities confirmed at around 2:20 p.m. there was no active threat and that the school campus had been secured.