Is there something I can do after being accused of causing an accident?

I had noticed the over pass was backed up. At the last minute I jumped over to get onto the on ramp, in the process of switching lanes the driver in the lane that I switched into had felt that I had cut him off, so he starts flashing his hi-beams multiple times, I had slowed down a bit because when I jumped over I felt that I was too close to the car in front of me. I was continuing down the on ramp, while he was still hi-beaming me and in the processes blinding me (it was dark out) and on my bumper, I was finding it hard to concentrate and I couldn't use my side mirrors to help me merge on to the on ramp. So I had slowed down again just before it starts to merge to try and see if I was able to get over. At this point he leaves his high beams on and gets even closer onto my bumper (with in about a foot of my bumper) at that point I couldn't see to get over. While trying to avoid an accident, I tried to pull off to the side of the on ramp to let him pass and avoid an accident. when I had slowed down for the third time now because I was trying to pull over he wasn't able to get his foot on the break in time and he rear ended me. He gets out of the car screaming, yelling at me, and using profanity. I had remain calm knowing that justice would be served for his road rage. The car behind him that wasn't involved in the accident that had stayed, I hadn't spoken a word to the witness for the whole hour we waited for the cop, the witness and the guy who had hit me talked the whole time. When the cop got there he pulled the witness aside talked to him alone and then let him go, he then talked to me and half way through my story he had stopped me and said "I already know what happened I have a witness" and walks away from me. He then talks to me and the other driver. He then accused me of break checking. In the end I got a careless and I could've sworn he got a reckless but it wasn't in the report, the report is written to make it look like I had caused it by break checking.