SEAN DAVIS: The Top 10 Undercovered Stories of 2017.. Including: “6. We still know nothing about what motivated the Vegas shooter. Months after the deadliest mass shooting in American history, we don’t know why the gunman fired on a crowd of innocent concertgoers. If law enforcement authorities have any leads or theories, they’re not sharing them with citizens eager for answers. Perhaps the feds don’t have a clue, either. Either way, it’s shocking that, months later, the country is still in the dark about what happened.”