James Carr's trial was moved from Clare County to Gratiot County in December 1885.There is quite a good write up about him on page 1317-1318 of "History of Gratiot County", Willard D. Tucker, 1913.His career was also described in Tom Powers' book "Michigan Rogues, Desperados and Cut-Throats: A Gallery of 19th Century Miscreants"Another great source is "Michigan's Timber Battleground"
I would expect that a lot of detailed information could be gleaned from the court records in Gratiot County.His case was also heard by the the Michigan Supreme Court in 1887.A previous trial at Harrison (Clare County) in May 1885 resulted in a hung jury, so there should also be court records there, as well as newspaper accounts of both trials in various Michigan newspapers.There was widespread interest in those trials.
James Carr had beaten the cases against him, but he couldn't avoid the final penalty. He likely didn't fare as well after his death in March 1892. Most people speculated that he had not sought the pardon and forgiveness of the Almighty, and may yet be suffering the eternal punishment for his earthly deeds.