He has been identified as 68-year-old Lewis Crosby of Wentworth Drive, Galina, St. Mary.
Four other persons were injured.
The gangs were based in the hotspot areas of Grey Ground, Greenvale and Barnstable.
Head of the division Superintendent Carey Duncan said the sustained reduction in crime is due to strategic operations of the police in the parish.
Director of Public Prosecution Claudette Thompson says she believes the jury returned the correct verdict in the constable Noel Maitland murder trial.
Constable Noel Maitland wept openly in court today after being found guilty of the murder of his girlfriend Donna Lee Donaldson.
Constable Noel Maitland found guilty