WINTHROP (CBS) – Police continue to investigate after a chaotic and deadly scene played out Saturday in a Winthrop neighborhood.

Three people were killed, including a suspected gunman, after police say he slammed a stolen tractor-trailer into a house and then fatally shot two people. The gunman was identified as 28-year-old Winthrop resident Nathan Allen, who DA Rachael Rollins said targeted the victims because they were Black.

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It all started around 2:45 p.m. on Saturday when a truck stolen from Rapid Flow Inc. slammed into a home on Veterans road, destroying the building.

(Photo Credit: WBZ-TV)

Investigators said the suspect from the truck was armed with two guns. He climbed out and shot a woman and man. Both bystanders were killed.

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Winthrop Police then shot and killed the suspect.

The body of a retired state trooper is brought to the medical examiner’s officer after he was shot by a suspect in Winthrop. (WBZ-TV)

The victims were identified as retired Massachusetts State Police Trooper Dave Green and Ramona Cooper a 60-year-old Staff Sgt. in the Air Force who is still involved in the military.

Saturday night Green’s body was escorted by police to the medical examiner’s office in Boston.

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Ramona Cooper and David Green was shot and killed in Winthrop on Saturday (Photos Via Suffolk DA/Massachusetts State Police)

Crews have since removed the truck from the home, but the damage is extensive. In one part of the home, only a door frame is standing. Staff