Said To Be Sam Bass, But the Picture's Authenticity Has Been Questioned

Karen Thompson in her book ROUND ROCK, TEXAS: FROM COWBOYS TO COMPUTERS disputes the authenticity of this picture, which was on a wanted poster, and has been seen in several other places, as being that of Sam Bass, instead claiming that the only authentic one is a group picture including Sam, John E. Gardiner, and Joe and Joel Collins, believed to have been taken in Dallas, TX in 1876, owned by Robert G. McCubbin, Jr., and is in Rick Miller's SAM BASS AND GANG, and in her book [on p. 180].