Antonio Centeio, 23, was shot to death at a Hess gas station in Brockton, Massachusetts on November 28, 2009. The killing occurred during a shootout at the station and remains unsolved.

The probe was complicated by problems with cooperating witnesses used by the Plymouth County District Attorney’s Office. One witness, Kashin Nembhard, who said he had seen the killing, had been arrested in a car loaded with heroin and cocaine; the DA’s office paid his bail, a payment that was not disclosed to the grand jury or the defense. When defense attorney Michael A. Bergeron learned of the bail payment and complained to the judge, all charges connected to the case were dropped in October 2012. A second cooperating witness, Olivio Leverone, had his own credibility issues after later involvement in a robbery of a drug dealer and a New Year’s Eve 2011 shooting that led to his arrest for firing a gun.

No arrests or convictions have been made in connection with Centeio’s death. Does anyone have information about the shooting or Centeio’s last known movements that could help bring answers to his family?