I was in Esfahn during the revolution. Been through the power shutdowns at night. I could wach the flames from the burning tires and see the flashes from the Centurion Tanks cannos andf hear the running gunfire. If I recall correctly, Nasiri (head of Savak) was killed on Feb 22, 1979
Nassiri was imprisoned in late 1978 and was executed on February 16 by a firing squad. Khomeini entered Iran on February 1.