Now, left with many unanswered questions, the Howard family is making it their mission to use his death for good. “We don’t know how many times he’s had it or not had it,” said Patty.

But just days after his graduation, the 22-year-old died May 24 from an allergic reaction to peanuts. His family says he ate a late-night snack at home that was contaminated. “He came in and ...