The ACLU was involved in the Miranda case, which addressed conduct by police during interrogations, and in the New York Times case, which established new protections for newspapers reporting on government activities.
In the 1970s and 1980s, the ACLU ventured into new legal areas, involving the rights of homosexuals, students, prisoners, and the poor.
For example, in a twenty-month period beginning January 2004, the ACLU's New Jersey chapter was involved in fifty-one cases according to their annual report—thirty-five cases in state courts, and sixteen in federal court.
They provided legal representation in thirty-three of those cases, and served as amicus in the remaining eighteen.
During the 1930s, the ACLU started to engage in work combating police misconduct and supporting Native American rights.