Details in this morning's horrific school shooting in Newtown, Connecticut, are clarifying: A young man killed his mother at their home, then drove to the elementary school he attended as a youth and killed 20 schoolchildren and six adults, reports the Hartford Courant. The shooter, identified as 20-year-old Adam Lanza, then killed himself. Early reports said his mother, Nancy Lanza, was a kindergarten teacher at the school, but that doesn't appear to be the case, reports Mediaite. More of what's known so far: