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An Oklahoma teenager convicted of murdering a college baseball player in 2013 was sentenced Tuesday to life in prison without parole.

Chancey Luna, 18, was found guilty in April of first-degree murder in the shooting death of Christopher Lane, a 22-year-old Australian on a baseball scholarship at East Central University.

Luna and two other friends were accused of shooting Lane in the back while he jogged — later telling investigators that they did it because they were bored, Duncan police said.

One of the co-defendants struck a deal to testify against Luna, while the third teen, Michael Jones, was sentenced to life in prison in March.

Luna was tried as an adult in the case, although his defense team argued he should have been in juvenile court because he was 16 at the time. They also claimed the teens wanted to scare Lane, not kill him.