Depends on the system they use , if its a owner operator , they might not even have any. The feds are working towards having it in all trucks but, not there yet.
Babaco systems go back at least 6 months. I'm not sure about other systems. We used the speed data once to counter a state troopers testimony in court. He had stated that the truck passed in an unsafe manner, at an unsafe speed. We were able to show that the truck was going the speed limit consistently, and never changed lanes on the stretch of road in question. This was in Montana.
Pretty sure that was the first time the trooper had hard data contradict him.
I know the name on the trailer. They are not hard to find. I hope the investigator checks with the company and see who was in the truck and question them.
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