Patrick Steinfeld

3:40 PM PT -- An expected news conference has been called off ... Celeste Rivas' family will not be speaking publicly from the courthouse this afternoon, according to a spokesperson for the D.A. at the scene. Celeste Rivas' family was expected to speak out publicly after D4vd was charged in her…

Celeste Rivas' family wants justice for their slain teenager ... and, according to their attorney, D4vd's arrest makes them feel they're going to get it. Patrick Steinfeld -- a lawyer for Rivas' family -- released a statement following the singer's arrest, explaining how the family plans to handle…