Historians with the Community of Christ (formerly the Reorganized Church of Jesus Christ of Latter Day Saints) recently made a stunning announcement: Daniel Larsen, a descendant of Mormonism’s founder, Joseph Smith, had discovered the only known daguerreotype of his famous ancestor in a locket passed down in the Smith family.

The emerging image was startling to many, who know Smith only from a portrait that was painted of him in 1842, and the photo appeared distinctly different from that.

The finding led to a nationwide conversation among members of the larger, Utah-based, Church of Jesus Christ of Latter-day Saints and those in the Community of Christ, which was launched in the 1860s by the founder’s family.

Viewers were asking: How do they know it is really him?

Lachlan Mackay, a Community of Christ apostle who directs that church’s historic sites in Nauvoo, Ill., and another descendant of Smith, helped analyze the locket, trace its ownership, and research the daguerreotype’s likely history.

On this week’s show, Mackay answer questions about the photo, the process historians used to authenticate it and why is convinced it is an image of Joseph Smith.