An 8-year-old boy who climbed into a parked school bus, released the emergency brake and sent 26,000 pounds of steel rolling through Crown Heights, Brooklyn, on Monday was charged yesterday with criminally negligent homicide in the death of Amber Sadiq, 8... The boy, Tafari James, had been suspended from second grade on Friday for climbing onto another unattended bus, ... Investigators said it was unclear whether he released the brake on Monday intentionally. Witnesses saw him board the bus alone... He rode the bus as it gathered speed down a slight incline and jump off as it thudded to a...