Thank you so much for your help! :-)
I did some searching on the John Smith who was murdered. I found two articles in the Markdale Standard, that is thankfully online.
An Old Man Shot Dead at His Own Fireside
Markdale Standard (Markdale, Ont.), 27 Jan 1882, p. 2http://news.ourontario.ca/ghpl/1116536/data?n=3
The Shelburne Tragedy: How did old John Smith come to his death? His nephew tried for the crime - strong circumstantial evidence.
Markdale Standard (Markdale, Ont.), 2 Nov 1882, p. 4http://news.ourontario.ca/ghpl/1117024/data?n=2
They are very interesting to read. I had hopped one might mention John's parents to find out his mothers surname. No luck on that so far!