Bahman Nassim (February, 1940 – January 28, 1980) was an Iranian record holder for the backstroke, as well as playing for the Iran men's water polo team between the years of 1958–1965.
He also served as the Chief of Police for the city of Semnan, Iran, where he was arrested after the overthrow of the Shah, under charges of "Murder of persons and/or killing Muslims or/and freedom fighters".
Sports were a big part of the family's activities, with the sons and daughters involved in swimming, diving, water polo, and basketball.
Bahman Nassim was approached while practicing for swimming competition by a high-ranking official, who asked if he would be interested in pursuing higher education through a police academy.
Stationed in Abadan, he was responsible for cracking down on the drug trade that was rampant throughout the port city, gaining a reputation for taking on the worst gangs despite the danger it put him in.