Grieving mom pleads for justice in fatal hit-and-run

A grieving Bronx mother is pleading for one of the drivers who ran down her son to come forward. 
Cinthia Berganzo's 16-year-old, Dylon Ramirez, was killed Sunday after being struck by two cars at the corner of Baychester and Crawford avenues in Edenwald. 
Ramirez's best friend, 15-year-old Iyana National, was walking with him. She was critically injured, but has since been released from the hospital. 
Both drivers who hit Ramirez drove off, but 26-year-old Shawn Williams was arrested after returning to the scene an hour later. He has been charged with leaving the scene of an accident resulting in death and reckless driving. 
The second driver remains at large, but Berganzo is hoping someone can help bring justice to her boy. His funeral is planned for this coming Wednesday.