BOSTON, Aug. 31, 2015—Three men were arraigned today in connection with the shooting death of 20-year-old Jean Louis, District Attorney Daniel F. Conley said.

TYSHAWN PEREIRA (D.O.B. 12/24/95) of Dorchester was arraigned in Dorchester Municipal Court on charges of murder and armed assault with intent to murder for allegedly shooting Louis to death and injuring another man during an incident on Bailey Street on the evening of July 11. Pereira’s co-defendants, MICHAEL JOHNSON-McNEIL (D.O.B. 11/14/95) and BOBBY ROBINSON-GILMERE (D.O.B. 12/23/93), were charged with being accessories after the fact to murder and armed assault with intent to murder.

At the request of Assistant District Attorney Catherine Ham, Judge Jonathan Tynes ordered Pereira held without bail pending trial. Tynes also ordered Johnson-McNeil held without bail until Sept. 23, when his attorney may argue bail, and Robinson-Gilmere held on $250,000 cash bail.

Ham told the court that Pereira opened fire on the car in which Louis and the surviving victim, a juvenile, were sitting just before 6:00 p.m. Prosecutors say Pereira was one of two men who approached the vehicle after pulling onto Bailey Street in separate BMW sedans, one blue and one black. Pereira allegedly opened fire. Louis was struck fatally; the surviving victim was grazed in the neck. After the shooting, Ham said, Pereira and the second man ran to the black BMW, which sped from the scene.

Two days later, Ham said, the blue BMW was involved in a car chase that led to the recovery of two handguns that were tossed from the vehicle. One of the firearms was a ballistic match to the one used in the fatal shooting and the other bore Pereira’s fingerprints. When this vehicle was seized and processed for evidence, Pereira’s fingerprints were found in the front passenger’s compartment. Data from a GPS monitoring device showed him to be at the scene of the shootings when they occurred and in the BMW when the guns were tossed.

The blue BMW belongs to Robinson-Gilmere, prosecutors say, and the black one is registered to a relative of Johnson-McNeil. In separate statements to Boston Police homicide detectives, both men allegedly indicated that they had been driving those vehicles on the evening of the shootings.

Pereira was represented by attorney Timothy Bradl. He and his co-defendants will return to court on Sept. 23.

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All defendants are presumed innocent until and unless proven guilty beyond a reasonable doubt.