Authorities say a man who may now be living on Trinidad is now wanted for the deaths of three people outside a Dorchester party in March.

Boston Police today issued an arrest warrant for Keron Pierre, 24, formerly of Mattapan, on charges he fatally shot Shacora Gaines and Chantal Palmer, both 20 and from Brockton, and Anthony Peoples, 19, of Boston outside 41 Mt. Ida Rd. around 4 a.m. on March 29. Gaines left two young children

The Suffolk County District Attorney's office says an argument led to their deaths in a car: "Investigators believe that Pierre and the victims spoke outside a party on Mt. Ida Road and that the conversation escalated into a verbal confrontation. That verbal altercation, investigators say, led Pierre to open fire on the victims as they sat in the car."

Gaines and Peoples were declared dead at the scene; Palmer died at Boston Medical Center.

"Police and prosecutors will not rest in the pursuit of someone who would take three lives in cold blood," District Attorney Dan Conley said. "Now that we've identified him, we intend locate him, apprehend him, and bring him to justice."

Conley and Police Commissioner Ed Davis said detectives and prosecutors continue to investigate the death. Anybody who knows Pierre's whereabouts can call the anonymous tip line at 1-800-494-TIPS or text the word TIP to CRIME (27463).