Prosecutors argued that Colin Gray bore responsibility for the 2024 shooting because he had given his son a gun and failed to act as the teen’s mental health deteriorated.

The case is an early test of a court that has never been used before, where much of the evidence is presented in secret and defendants cannot challenge how it was collected.

Scientists have found smallpox viruses in the remains of people in Chile from around 500 years ago, revealing how the virus may have evolved into a global killer.