I need help finding the car that hit my little brother near Clark and Pratt

Hey guys, I’ve never written here before but on Saturday November 9th around 4 p.m. my brother and his friend both m13 were riding their bikes near the crossing by the McDonald’s on Clark and Pratt when a (as described by witnesses and them) a red compact car (maybe ford or Toyota) ran a red light and hit both of them. The car then sped away west on Pratt. Bystanders called an ambulance they showed up before I did. When I got there cops told me that the cameras caught the incident but couldn’t make out the license plates. I don’t know what I should do next. I feel a lot of anger since the car didn’t even stop to check up on 2 kids just trying to live their lives. If anyone could help me figure out what I can do next I would really appreciate it. Thank you in advance💙