My Grandpa is shown at the left side of this photograph, standing next to a man who appears to be the same John Brown who rode with Quantrill. 

The man in the inset at bottom right is identified as John Brown in Joanne Eakin and Donald Hale's Branded As Rebels.

The photograph of my Grandpa was taken at a Quantrill reunion. 

Ask yourself, "Why would James L. Courtney, a man who had supposedly served in the Union army, attend a reunion of the Quantrill guerrillas?"