Three-year-old Gavin Levi Pittman of Apison, Tennessee, died from a gunshot wound on Monday, February 29, 2016. The Hamilton County Sheriff’s Office reported that Gavin found a pistol and accidentally shot himself. He was described as a typical little boy who adored Elmo and John Deere tractors.

The incident prompted an investigation that focused on how a toddler gained access to a loaded firearm. Gavin’s mother, Kelly Pittman, was taken into custody and charged with criminally negligent homicide and child endangerment amid allegations that the death was preventable due to negligent storage or supervision.

What details about the scene or the firearm might help explain how Gavin accessed it?