4-year-old Cooper Treacy rings bell marking end of cancer treatment

It was a sweet sound to Cooper Treacy's family. He rang the bell at St. Louis Children's Hospital Friday morning, marking his last cancer treatment. The 4-year-old was diagnosed with neuroblastoma a year and a half ago.
Published: 4:30 PM CDT May 28, 2019
Updated: 4:30 PM CDT May 28, 2019