They can only investigate an accident as it is not as it was(I learned this the hard way). Record cell phone video and take pics as soon as you exit the vehicle. Never move your car unless your life is in danger.

Call the cops supervisor they were behaving like dicks saying you fled.Always have cams in your car and take pics/record from your cell phone in case they flee.

I hope you and your little ones are OK I'm sorry this happened.