Sue Ogrocki, Associated Press
Twenty-three year old Aaron Boyer, who lives nearby, sits by the memorial for slain Australian Christopher Lane while out for a run in Duncan, Okla., Tuesday, Aug. 20, 2013. Lane, who was on a baseball scholarship at East Central University in Ada, Okla., was in Duncan, Okla., visiting his girlfriend, when he was shot and killed Friday, Aug. 16, 2013.

DUNCAN, Okla. — A third teenager has been charged with first-degree murder in the fatal shooting of an Australian baseball player in Oklahoma.

Prosecutors filed the upgraded charge on Wednesday against 17-year-old Michael Dewayne Jones. Jones initially faced lesser charges, including accessory after the fact.

Jones is now among three teenagers accused in the August death of 22-year-old Christopher Lane. Lane, who was from Melbourne, was preparing to enter his senior season at East Central University in Oklahoma when he was shot while jogging.

Police have said Jones told authorities the boys were "bored" when they targeted Lane. Autopsy results showed that Lane died from a gunshot wound to the back.

The other two teenagers also are charged with first-degree murder in the case.