In 2001, a Haitian court convicted him in absentia and sentenced him to life in prison for his role in the Raboteau Massacre. In 2008, he was convicted of mortgage fraud and sentenced to 12–37 years in prison. He is currently incarcerated in a maximum security prison in New York.
In mid-1993, two years after the 1991 Haitian coup d'état, Constant set up paramilitary group known as the Front for the Advancement and Progress of Haïti (FRAPH) to terrorize supporters of exiled president Jean-Bertrand Aristide. A CIA source implicated Constant in the 1993 assassination of Justice Minister Guy Malary, although the agency said the source was "untested".
Constant was paid by the CIA from 1992 to 1994, as were several leading members of the military junta. He provided information to the agency for about $500 a month, according to United States officials and Mr. Constant himself.
After the 1994 U.S. and UN-led multinational occupation restored Aristide to power, Constant escaped to the U.S.. He was detained by INS officials in 1995 and prepared to be deported to Haïti to stand trial for involvement in the Raboteau Massacre. However, in a December 1995 interview with Ed Bradley on 60 Minutes, Constant threatened to divulge secrets about his relationship with the CIA during the early '90s. In May 1996, after receiving Constant's threat, and intelligence that there was a plot to assassinate him should he return to Haïti, the Clinton administration ordered the INS to release Constant.
In 2001, Constant was convicted in absentia of his role in the Raboteau Massacre and sentenced to life in prison and hard labor.
On July 7, 2006, Constant appeared in a Long Island, New York county court to face charges that he participated in a mortgage scheme that defrauded Sun Trust Mortgage Bank and Fremont Investment and Loan of more than $1 million. The purported fraud took place while Constant was employed at Melville Brokerage.
On October 28, 2008, Judge Abraham Gerges of the Kings County Supreme Court sentenced Constant to serve 12–37 years in prison. Judge Gerges concluded his memorandum with a plea that the United States government allow Constant to serve his entire sentence in New York State, rather than return him to Haiti "where he may evade justice due to the instability of the Haitian judicial system." Judge Gerges noted that "it is apparent that the federal authorities may deport him shortly."
- David Grann, The Atlantic Monthly, July 2001, Giving "The Devil" His Due.
- Sentencing Memorandum, 28 October 2008.
- NYS Department of Correctional Services Inmate Information Archived April 20, 2010, at the Wayback Machine.. As of February 3, 2011, Constant was in custody at the Coxsackie Correctional Facility.
- Tim Weiner, New York Times, 13 October 1996, '93 Report By C.I.A. Tied Haiti Agent To Slaying.
- New York Times, 7 July 2006, Infamous Haitian Accused of Fraud