Tarvaris Jackson lost control of his car while doing 70 in a 30 mph zone -- slamming into a signpost and crashing into a ditch, this according to the police report obtained by TMZ Sports.
The former NFL quarterback was fatally injured in the April 12 crash in Montgomery, Alabama around 8:50 PM.
According to the police report, the road where Jackson crashed was not well lit -- and he lost control while going around a bend.
When emergency personnel arrived to the scene just a few minutes after the crash, Jackson was "unable to give a reason why he crashed his vehicle.