a lower cost per inmate, a lower rate of critical incidents, a safer environment for employees and inmates, and a higher proportional rate of inmates who completed basic education, literacy, and vocational training courses. However, the publicly run prison outperformed the privately run prisons in areas such as experiencing fewer escape attempts, controlling substance abuse through testing, offering a wider range of educational and vocational courses, and providing a broader range of treatment, recreation, social services, and rehabilitative services. According to Marie Gottschalk, a professor of political science at the University of Pennsylvania, studies that claim private prisons are cheaper to run than public prisons fail to "take into account the fundamental differences between private and public facilities," and that the prison industry "engages in a lot of cherry-picking and cost-shifting to maintain the illusion that the private sector does it better for less." The American Civil Liberties Union reported in 2013 that numerous studies indicate private jails are actually filthier, more violent, less accountable, and possibly more costly than their public counterparts. The ACLU stated that the for-profit prison industry is "a major contributor to bloated state budgets and mass incarceration – not a part of any viable solution to these urgent problems." The primary reason Louisiana is the prison capital of the world is because of the for-profit prison industry. According to The Times-Picayune, "a majority of Louisiana inmates are housed in for-profit facilities, which must be supplied with a constant influx of human beings or a $182 million industry will go bankrupt." In Mississippi, a 2013 Bloomberg report stated that assault rates in private facilities were three times higher on average than in their public counterparts. In 2012, the for-profit Walnut Grove Youth Correctional Facility was the most violent prison in the state with 27 assaults per 100 offenders. A federal lawsuit filed by the ACLU and the Southern Poverty Law Center on behalf of prisoners at the privately run East Mississippi Correctional Facility in 2013 claims the conditions there are "hyper-violent", "barbaric" and "chaotic", with gangs routinely beating and exploiting mentally ill inmates who are denied medical care by prison staff. A May 2012 riot in the Corrections Corporation of America-run Adams County Correctional Facility, also in Mississippi, left one corrections officer dead and dozens injured. Similar riots have occurred in privatized facilities in Idaho, Oklahoma, New Mexico, Florida, California and Texas. Sociologist John L. Campbell