Langford, a CHP officer, killed Silva’s son while speeding to respond to an emergency call.  Langford was statutorily immune from liability under Vehicle Code 17004, but the CHP was not.  Gov. Code 815.2(b) immunizes a government entity when its employee is immune except as “otherwise provided by law.”  Vehicle Code 17001 otherwise provides, making an entity liable for death or injury caused by its employee’s operation of a motor vehicle.