On March 27, 2004, the provisional government banned Neptune from leaving the country, along with 36 other senior officials of the Aristide administration, in order to more easily investigate corruption allegations. On June 27, 2004, after hearing about a warrant for his arrest on the radio, Neptune turned himself in to the Haitian police and was held without charge. According to the Haitian constitution, a hearing before a judge is required within 48 hours for anyone arrested, but Neptune was not given such a hearing. On May 4, 2005, Thierry Fagart, the chief of the human rights division at the UN's Haiti mission, called Neptune's detention illegal.