Since you mentioned Bert Buchanan was in the Twin Falls area in 1910, I thought this Bert in this article, is possibly your Bert. The last paragraph mentions his age, which is about 10 years off. Sometimes mistakes are made when reporting. Then again, it might not be your Bert.
I am not related. I just found the article and thought you might be interested.
Date: September 05, 1912
Paper: Idaho Statesman
FARMER KILLED IN A QUARREL OVER RAKE
Thomas F. Fisher Fatally Shot by Bert Buchanan at Twin Falls
Lives But A Few Minutes
Bullet Cuts Artery in Right thigh and Death Comes Quickly
TWIN FALLS Sept. 4 -
A quarrel about 5:30 this afternoon between Thomas F. Fisher and Bert Buchanan, living near this city, over a question of a hay rake, resulted in the fatal shooting of Fisher, according to the story of Perry Rief, who resides near Kimberley. He came to town today with Buchanan who was returning a hay rake he had borrowed from Fisher. The parties met at the Sterling creamery and hot words followed over a tooth that was missing from the rake.
Fisher Uses Whip
According to Rief, Fisher struck Buchanan a hard blow with his whip, breaking the whip stock with the force of the blow. Buchanan staggering back, pulled a revolver from his pocket and fired at Fisher. Seeing that the shot had struck, Buchanan ran to a livery stable a few blocks away, where he asked the proprietor to phone for an officer, saying he had shot, a man but did not know how seriously. He then went up into the hayloft to await the coming of the officer.
Dies in Few Minutes
In the meantime those witnessing the shooting hastened to the wounded man, who staggered to his horses heads, where he stood a few minutes then fell. A physician and an ambulance had been called, but on arriving, not more that 15 minutes after the shooting, found Fisher dead. The shot had severed an artery entering the right thigh, causing death within a few minutes. The coroner’s inquest will be held tomorrow afternoon.
Fisher, the dead man, was about 37 years of age, and leaves a wife and a son about nine years of age. Buchanan is a young man of 25 and married. Both were steady, industrious men of good reputation.