Final answer:
The photos taken by Chris McCandless, which were developed by the Alaskan State Troopers, showed his experiences in the Alaskan wilderness reflecting his solitude and adventures as depicted in Jon Krakauer's 'Into the Wild'.
Step-by-step explanation:
The photographs developed from Chris McCandless's second camera, which were found among his remains, depicted him in various states of his journey in the Alaskan wilderness. There isn't a specific description in the question of what the pictures contained, so it isn't possible to provide exact details on this.
However, based on Jon Krakauer's narrative in Into the Wild, one could infer they showed scenes of his daily life and the natural surroundings he was immersed in, capturing the essence of his solitary existence and his adventures in the wild.
When Alaskan State Troopers were investigating Chris' identity, they developed pictures found on his camera. The developed pictures showed several images of Chris himself. These pictures symbolize Chris's acquisition of wisdom and self-knowledge through his adventures in the wilderness.