Silvanna Moreno died on March 18, hours after being put under anesthesia for a dental procedure Silvanna Moreno, a 9-year-old California girl, died on March 18, hours after undergoing a three-hour ...

New details offer insight into the final moments of a 9-year-old girl who was put under anesthesia for a dental procedure one morning — then was dead hours later. Silvanna Moreno died on March 18 ...