HACKENSACK, N.J. (AP) - A former New York City police officer has been sentenced to life in prison for fatally stabbing his ex-girlfriend with a machete-style knife during an ambush at her New Jersey home.

Arthur Lomando was convicted of murder in the October 2015 death of Suzanne Bardzell. The 48-year-old was sentenced Friday to life.

Prosecutors say Lomando wanted revenge after Bardzell, a mother of two, got a restraining order against him just weeks before he attacked her in the driveway of her Midland Park home. He stabbed her more than 30 times.

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Defense lawyers didn't dispute Lomando's role in the killing but cited his long history of mental illness.

Lomando jumped in front of a subway train after the murder and lost both his feet.