An off-duty cop ran a Red Light. Speeding through the intersection, she hit my '94 Bronco w/ a 351-upgrade engine with enough force to push me over two lanes into oncoming traffic, slamming me into two other vehicles. She lied to the officers, claiming I ran the light. The light had just turned Green for me. I was coming out of a full stop through the intersection when she hit me. She was driving a two-door sports sedan, coming up a slight hill, with Speed Limit posting of 45mph. Her car probably weighed tops 1100lbs, while my Bronco had about 4500lbs, with contents. The force of impact pushed the Passenger seat into my shoulder and the center console into my leg. The impact, from vehicle in Turning-Lane, set my front end back - 2-1/2'. I believe she was traveling 70-75mph. Need to find information showing weight ratio & rate of speed in regards to force of impact. Any suggestions, PLEASE! Having to represent myself against East Texas cops. Thank you for any help you can give me.