KNTV NBC Nightly News March 8, 2015 00:16:00
His family is taking legal action in hopes of preventing another tragedy. nbc's john yang has the report. >> reporter: logan stiner was at the top of his class, an athlete, prom king loved by those who knew him. >> he made everybo >> reporter: just days before his high school graduation last may, logan was found dead. he had overdosed on pure caffeine powder. what do you think of this product? >> i think it should be off the market, banned unless it's in the hands of a licensed pharmaceutical company. >> reporter: logan's parents say a friend gave it to him. it's sold as a dietary supplement t...