My question involves a traffic accident in the State of: Illinois
Unit 1 = The Other Car
Unit 2 = My Car
Unit 1 was reversing down a one-way feeder lane to park into diagonal spot more than one car length's away when he struck Unit 2 in the rear right side.
Unit 2 was reversing out of a parking spot after having confirmed that there were no oncoming traffic. Unit 2 was already midway into the lane when he saw Unit 1 reversing down the aisle, so he stopped the car and tried to alert Unit 1 by honking, but was struck first.
Unit 1's insurance adjuster stated that we were both at fault in this situation because we were reversing at the same time. Is this true? Am I at fault as well? Any advice would be greatly appreciated. Thank you.

