Due to harsh new sentencing guidelines, such as 'three-strikes, you're out,' "a disproportionate number of young Black and Hispanic men are likely to be imprisoned for life under scenarios in which they are guilty of little more than a history of untreated addiction and several prior drug-related offenses... States will absorb the staggering cost of not only constructing additional prisons to accommodate increasing numbers of prisoners who will never be released but also warehousing them into old age."
Source
Craig Haney, Ph.D., and Philip Zimbardo, Ph.D., "The Past and Future of U.S. Prison Policy: Twenty-five Years After the Stanford Prison Experiment," American Psychologist, Vol. 53, No. 7, July 1998.
