Valero and another student, who was not identified, were headed home after stopping at an IHOP after prom when they were struck.
"Sadly, Jocelynn did not survive the accident and the other student is in the hospital," the school district, YES Prep Public Schools, said in a statement posted to Facebook Saturday afternoon. "Our thoughts and prayers are with their families today and in the days and weeks to come."
The suspected drunken driver, identified by KHOU as 27-year-old Edin Palacios-Rodas, was transported from the scene with minor injuries. He faces charges of murder and evading arrest.
It's the second time in recent weeks that the Valero family has grieved for a death in the family. In April one of Jocelyn's older brothers, Josecho Valero, died in an unsolved shooting outside a nightclub, according to the Houston Chronicle.