BOSTON – A Boston man was sentenced Tuesday to mandatory life without parole for killing four people – including a 2-year-old boy in his mother’s arms – in a drug-related robbery in 2010.

Judge Jeffrey Locke told Dwayne Moore the killings, particularly of toddler Amani Smith and his 21-year-old mother, Eyanna Flonory, were “without excuse.”

“Their murders violated not only our law, those of society, they violated any code or law of the street, without excuse, without necessity,” Locke said.

Moore was convicted Monday of first-degree murder for their deaths, and for killing Flonory’s boyfriend, 21-year-old Simba Martin, and 22-year-old Levaughn Washum-Garrison. He was sentenced to four consecutive life terms.

A fifth shooting victim, Marcus Hurd, was left paralyzed.

Victims’ family members also spoke in court Tuesday.

Ebony Flonory said her sister “wanted to be a police officer to stop the violence.”

Washam-Garrison’s mother, Patricia Washum, said the victims’ lives were worth much more than the robbery yielded. “For the amount of money, which was $1,800, and you divide that by five people, $360 per person, appalling, appalling,” she said.

Some of those killed were apparently dragged into the street naked before being shot. Hurd testified he went to Martin’s house in the Mattapan neighborhood to buy marijuana and was shot after being ordered outside.

Moore did not speak in court, but he hugged his lawyer, John Amabile, who has said he will appeal.

Amabile has said the prosecution’s star witness, Kimani Washington, was a “snake oil salesman” who himself did the killings. Washington admitted participating in the robbery, but said he left before the shootings.

Prosecutors acknowledged Washington was a career criminal but said other evidence supported his testimony. He made a plea deal for a 16- to 18-year sentence.

The two-month trial was Moore’s second. His first in March ended in a hung jury. it hard to pick a jury in Boston.