NEW YORK — Former New York Police Commissioner Patrick Murphy is being remembered as the embodiment of police reform after his death at age 91.

Gerard Murphy says his father died of a heart attack Friday at a hospital in Wilmington, N.C.

Murphy was chief of police in Detroit, Washington and Syracuse, N.Y., as well as the nation's largest city during the turbulent '60s and '70s.

In 1968, he ordered police to use restraint in controlling riots in Washington after the killing of Martin Luther King Jr. In New York in 1972, he instituted rules restricting the use of deadly force to situations in which police needed to defend a life.