So, based on meager info I was able to find and A LOT of speculation on my part. The attemp murder charged in 2012 was dismissed because his ex-wife died at home. My speculation on that, based on the info I was able to find is that it was likely an OD. According to the link provided by JoreLock he was a POI of interest in a murder case in 2014 but the grand jury failed to indict. That news organization fails to say WHY they failed to indict but a cursory search for the victim's name shows that her niece was arrested and charged with her murder, also in 2014.
On a separate note, Mr Miles is not a nice man.
ETA: I wonder why so many charges against him were dropped. I mean, if these were low-level crimes I could understand but if that list is correct, those are some serious charges, esp the *advertiser censored* involving juveniles.