article_snippet.sent: And haunting images published in 2011 proved that government doctors used the jail in Philadelphia, Pennsylvania to test chemical substances on inmates and disabled American citizens.
article_snippet.sent: Images which emerged in 2011 (pictured) showed the aftermath of  experiments carried out on the prisons inmates and proved the brutal tests were taking place .
article_snippet.sent: Urban photographer Cindy Vasko captured the eerie silence and gradual decay of the once-overcrowded prison, which has become infamous for the medical testing that took place on Urban photographer Cindy Vasko inmates.
article_snippet.sent: Prisoners in the jail were paid to test a variety of dangerous substances such as radioactive, hallucinogenic and toxic materials according to an author who saw the intense cruelty with his own eyes.
article_snippet.sent: Allen Hornblum claims that between 1951 and 1974, Prisoners in the jail acted as lab rats for over 30 pharmaceutical companies and government agencies.
article_snippet.sent: But Kligman's distinguished career was tarnished by accusations of human cruelty inside Holmesburg prison that inspired federal restrictions on human testing, according to the New York Times.
article_snippet.sent: A review of medical journals from the prison revealed that some tests were carried out with the hopes of finding lifesaving treatments .
article_snippet.sent: Almost 300 former prisoners filed a lawsuit against the City of Philadelphia and Albert Kligman in 2000, alleging Almost 300 former prisoners were cruelly experimented on between 1961 and 1974.
article_snippet.sent: Partly due to the abuses at Holmesburg, federal regulations were tightened up to restrict medical studies inside prisons to those posing minimal risks to inmates.
article_snippet.sent: Albert Kligman denied any wrongdoing, according to the Baltimore Sun who quote Albert Kligman as saying: 'My use of paid prisoners as research subjects in the 1950s and 1960s was in keeping with this nation's standard protocol for conducting scientific investigations at that time.
article_snippet.sent: Between 1951 and 1974,  inmates housed in these now-empty cells acted as lab rats for over 30 pharmaceutical companies and government agencies .
article_snippet.sent: Accused: Albert Kligman Albert Kligman denied any wrongdoing and claims Albert Kligman use of 'paid prisoners as research subjects' was in keeping with this nation's scientific protocol . '
highlights_snippet.sent: Inmates were paid to test a variety of dangerous substances such as radioactive, hallucinogenic and toxic materials .
  