[5] According to the Institute for Justice & Democracy in Haiti (IJDH), Duperval was the highest-ranked soldier ever deported from the U.S. to face human rights charges.

The activities of the BAI and the Haitian government of Jean-Bertrand Aristide in seeking justice for the victims of paramilitary and military violence are documented in detail.

His view on how the case was exploited and manipulated to undermine the elected government of Jean-Bertrand Aristide is discussed in more depth in an interview with Joseph and attorney Brian Concannon.

On 6 May, the Court ruled that the Haitian government had violated 11 provisions of the American Convention on Human Rights by keeping Neptune, a former prime minister, in detention and failing to try his case with sufficient speed.

[22] In 2010, Joseph and the BAI worked with a number of victims of sexual abuse in the IDP camps created following the 2010 Haiti earthquake.

[23] In January 2012, Joseph spoke out against a ruling by a judge that former dictator Jean Claude Duvalier would be tried only for embezzlement and corruption charges, rather than human rights abuses.

His advocacy generated frequent threats; his family was forced to leave the country, and Amnesty International issued an Urgent Action alert out of concern for his safety in November 2004.

On 28 September, Jean Renel Sénatus, former Chief Prosecutor of Port-au-Prince, stated that he had been dismissed by the Ministry of Justice after refusing to order the arrest of 36 opposition activists, including Joseph.

The reports caused Amnesty International to begin another "Urgent Action" letter-writing campaign on Joseph's behalf, calling on authorities to investigate the threats.