My mom was in a car accident. Please help

Hi everyone, on thanksgiving, around 4pm, my mom was involved in an accident at the west bellfort intersection under beltway 8. She was on W. Bellfort heading south. My grandma was in the backseat and ended up passing from her injuries (internal bleeding). People were just standing around afterwards and didn’t help right away. We had the funeral today and my mom is recovering in the hospital. Next is to sort is the actual accident. If there is any chance anyone on here witnessed it or has footage, my family and I would greatly appreciate any help. Even advice would be helpful. Thank you.