A former New York City police officer has been sentenced to 25 years to life in prison for fatally shooting his 22-year-old fiancée during an off-duty argument.

Queens District Attorney Richard Brown called Harry Rupnarine's act senseless. The 39-year-old former officer was sentenced Friday. A jury had convicted him of murder in September.

Rupnarine and his fiancée, Guiatree Hardat, of Brooklyn, were arguing at a bus stop in Queens on May 10, 2007, when he shot her in the head with his Glock 9-mm handgun.

Hardat had emigrated from Guyana and was attending college to become a high school math teacher when she was killed.