Herbert Leslie Packer (1925–December 6, 1972) was an American law professor and criminologist. His key work is the book The Limits of the Criminal Sanction (1968), which proposed two models of the criminal justice system, the crime control model and the due process model. These models were extremely influential in criminology and criminal policy debates. In 1969, Packer suffered a stroke that partially paralyzed him. Three years later, Packer committed suicide at the age of 46 in San Francisco. He did not finish a planned biography of Learned Hand.