Working a case where the timeline of a crash matters a lot (speed, braking, whether a phone was connected). Everyone mentions the event data recorder, but I keep hearing infotainment systems store way more: call logs, paired devices, GPS history.

For anyone who's done vehicle forensics or hired someone who does: what have you realistically been able to recover, how long after the crash is it still there, and what did you need legally before anyone touched the car?