Convict Shota Mekoshvili, 32, from Georgia stabbed cab driver Mohammed Kamal Uddin, 47, was found murdered in a secluded neighbourhood in Stamford on Aug 27 that year.
Police said the Stamford taxi employee was stabbed up to 16 times in his torso.
Stamford police arrested Mekoshvili the same day.
Prosecutors said it was an attempted robbery that led to a deadly struggle.
Bangladeshi expatriates gathered outside the court and demonstrated demanding maximum punishment of Mekoshvili.
Kamal Uddin, hailing from Chittagong’s Anwara Upazila, lived at the town’s Dotel Road with his wife Razia Shalia and only child. He moved to the US in 1992.
She said she was happy with the sentence, and thought Kamal’s departed soul would also feel the same.