A Lexington Park man was sentenced to life in prison Thursday for murdering his wife in 2009, authorities said.

Ryan Holness, 30, a former Navy air traffic controller, was convicted of stabbing Serika Holness multiple times during a late-night trip from Brooklyn, N.Y., to Maryland.

During a two-week trial, Holness said a masked carjacker bound his hands and feet and stabbed his wife when she tried to flee. He said he wanted to help his wife, but the carjacker kicked him in the head, causing him to black out.

A few months before his wife’s death, authorities said, Holness opened a $500,000 life insurance policy in her name. He was the sole beneficiary.

DNA, a third-party confession letter he wrote and other evidence also helped convict him, authorities said.

Holness was convicted in U.S. District Court in Baltimore of interstate violence, attempted witness intimidation and attempted obstruction of an official proceeding in March.