Boy Killed In Classroom Was ‘Happy Child’ With Rare Disorder

SAN BERNARDINO, Calif. (AP) — An 8-year-old boy shot and killed along with his teacher in a San Bernardino special-education classroom was born with a genetic condition and had survived heart surgery, a school official said.
Jonathan Martinez had Williams syndrome, a rare disorder characterized by learning delays, mild-to-moderate intellectual disabilities and heart problems, according to Dale Marsden, superintendent of the San Bernardino City Unified School District.
But affected children