Thomas was one of three people charged with killing Bercy and wounding another teenager in a drive-by shooting.
A review of the case by the district attorney's Conviction Review Unit found that the lead detective in the Bercy shooting asked to unseal a prior arrest of Thomas for allegedly pointing an inoperable gun at police officers so that detectives could use his picture in a photo lineup.
Detectives also obtained a photo of a different Sheldon Thomas and showed it to a witness they were questioning in Bercy's shooting. The witness identified the second Sheldon Thomas as being in the car the shots were fired from, the investigation found.
Based on that identification, detectives went to the home of the first Sheldon Thomas and arrested him, investigators said.
Prosecutors allege that a photo of another man with Sheldon Thomas' name was used to erroneously convict him in a homicide case.
The faulty photo identification came to light during a June 2006 pretrial hearing when Detective Robert Reedy admitted on cross-examination that the defendant's photo had not been in the lineup.
The judge nonetheless found that there was probable cause to arrest Thomas based on "verified information from unknown callers" and the fact that he supposedly resembled the other Thomas, investigators said.
Thomas was convicted of second-degree murder and other charges and sentenced to 25 years to life in prison.
Investigators from the Conviction Review Unit reinterviewed witnesses and found that the detectives, particularly Reedy, had harassed Thomas after his earlier gun arrest and that they coached a witness to identify Thomas as one of the shooters in the Bercy killing because they "were intent on arresting defendant."
JUDGE RELEASES MICHIGAN MAN WHO CLAIMED WRONGFUL DOUBLE HOMICIDE CONVICTION
Reedy, then retired, was later disciplined following an investigation by the Internal Affairs Bureau. A phone call seeking comment on the reinvestigation into the 2004 shooting was left Thursday with a number listed for a Robert Reedy.
Thomas was scheduled to appear in court Thursday before Judge Matthew J. D’Emic of Brooklyn state Supreme Court. The district attorney’s office said in its report that the conviction should be vacated and the case should not be retried because the evidence was defective.
Gonzalez called Thomas' conviction "fundamentally unfair" and added, "I am determined to continue doing this critical work whenever we discover a questionable conviction in Brooklyn."
An email seeking comment was sent to an attorney for Thomas.