What was the source of the human-looking image in the photo of the two kids taken at an abandoned Arizona rest stop sent to us by [name withheld]?

This is a ghost image captured on camera. It is the image of a person who lived a prior life in this area and remains earthbound. It is simply being curious about the energy of people who have gathered there, and this is the reason for being in the location in the first place. It is not visited frequently, but this does happen and there will be a sensing of the energy, and at times, when there is curiosity and the spirit energy approaches the visitors, it can become intensified and then the energy is detected in photos. This is a consequence of an energetic flow and flux that ramps up the energy sufficient enough to affect the device capturing the moment. It is something that happens again and again and is often unnoticed and unappreciated but can be a source of fascination when the true nature of what has happened is understood and appreciated. So this is a genuine ghost photo and represents a lost one. This individual could benefit from a Spirit Rescue, as you are thinking in the moment here, and would be a blessing indeed.