My Wife's Ex Has Been Internet Stalking Me For 13 Years.

He's posted slander on my Google business page, made fake facebook accounts to reach out to my wife, has a reddit page filled with comments about only continuing living to read my obituary, about how I killed his ex and their child, even mentioning me by name multiple times, citing his hatred for me over and over again. He skirts just close enough to making actual threats that the police will do nothing. It's causing me extreme stress and anxiety, sleepless nights, and I'm just tired of it. It's been 13 years, I've raised his child from the age of 1. He's made no attempt to be a part of his son's life and blames me for becoming a major alcoholic/drug abuser because I "stole his family." He owes $30k+ in child support. The debt accumulates but the courts don't pursue it because I asked my wife to stop the support due to fearing for my life and not wanting to provoke him. He's made several comments about how when his elderly parents die he's going to kill me, then himself. Again in a roundabout way, just clear enough to make the point, but not incriminate himself. I don't know if there's anything I can do, but if there is, I'd love some advice. We sought a protective order once, and it was denied within 24 hours. I couldn't believe it honestly. Maybe it was a formatting issue? We've made police reports for years, with no results. He lives about 40 minutes away and we have plans to actually move out of the state in a little over a year. It just seems like his mental state gets worse and worse and I don't know if a year is fast enough but my hands are tied until I'm done remodelling/selling my house and completing my current non-transferable education (just over a year remaining). I have years of screenshots, but so far they've been no help. I can't afford to hire a lawyer to sue him and I fear it would just cause him to show up to my house with a gun if I did. My biggest objective would be to somehow report all of this to an authority with the ability to take away his right to own a firearm, because the way it appears to me, it's just a matter of time. He currently has a warrant for battery and has made posts on reddit about commiting suicide by cop if they ever try to wrongfully arrest him because he did nothing wrong. He's deeply narcissistic and talks on here constantly of his mental health issues.

Any advice is greatly appreciated.

Location: Indiana.