How is photo authentication complicated when there is no witness?

The correct answer highlights that photo authentication becomes complicated due to the necessity of demonstrating the camera's operation and handling. In the absence of a witness, the integrity and authenticity of a photograph may come into question, making it crucial to establish how the photo was taken. This process involves showing that the camera was functioning correctly and that the handling of the camera didn't compromise the image.

When a witness is available, they can often provide context that supports the authenticity of the photograph, such as confirming the time and place it was taken. Without this testimony, the focus shifts to the technical aspects of the photograph's creation. Proving that the camera was operational and that the photograph was not altered after being taken becomes vital in substantiating its authenticity in legal scenarios.