I Was Chased, Tailgated, Side Swiped, And Almost Ran Off The Road. Police Refuse To Act On It.

FYI: I have dash can footage of the entire event.

NW Indiana Jan 10th Slushy roads

Quick rundown: I stopped at a stop light.(in my business truck), a pickup truck pulls up behind me, flashes his brights at me as soon as the light goes green (I mean milliseconds after), proceeds to tailgate so close I cannot see his headlights for the next 12 mins, I turn my emergency flashers on (I'm going 5mph under the speed limit), he's swerving to put his brights in my sideview mirror, flashing them and honking his horn. He finally pulls along side of me then turns his wheel directly into me hitting his passenger rear truck bed into my driver front fender. I pull up and tell him he hit me to which he says "No I didn't", I tell him I have it on camera, he says it's slippery, I call 911 and we both pull over, he gets out of his truck and yanks my truck door open and asks what I'm doing, 911 operator tells me to close and lock my door and stop talking to them. It took 20 days for the city to get me a proper police report with the correct info (had my info wrong on the 1st report). The city says they aren't going to do anything about him chasing and hitting me even though it's on video. The county sheriff told me to call the state police. The state police told me they won't do anything if the other agency didn't do it and that no other agency will. State cop told me I'd have to go a civil route if I wanted it to go further but they won't step on another agencies toes.

I mean what do I do? This guy literally tried to smash me off the road... cops don't care. I feel like he should be in jail and I should sue the shit out of him... my damage is only about $400 per our body repair shop estimate. But my front bumper literally ripped his rear bumper halfway off his truck. No idea how much damage he has.

What do i do?