The students in the marching band at Ingrid B. Lacy Middle School in Pacifica were like family to Jerry Downs. The school’s 62-year-old band director would work with his budding musicians late after the end of the school day and even spent his own money to keep the music program alive. But on Thursday, students, teachers and parents were stunned and saddened after learning that Downs — who taught in the Pacifica School District for 15 years — was killed in a freak accident at Lacy Middle School the day before.