shock. i didn't understand why she hadn't stopped when she hit bill. i couldn't understand it. i still don't understand it. i felt like stopping, but i didn't know if she had a gun. and my first instinct is to make a quick u-turn. >> so she does a u-turn too? >> right. she continues to hit me. we even pass the scene of where bill was clinging to his life, and even at that she didn't bother to stop hitting me. >> bonnie eventually made her way back to where bill lay by the road. >> and i see just hecticness everywhere. police cars, detectives, ambulance. >> she said she tried to get to bill, but the officers wouldn't let her near him. >> i wanted to hug him. i wanted to hug him. i wanted to tell him everything was going to be okay. >> bonnie watched the helicopter take bill away. hours later, a police officer gave her the news she was dreading. >> he goes, bill has passed away.