DUNCAN, Okla -- Testimony begins today in the murder trial of a Stephens County teen accused of killing an Australian athlete nearly two years ago in Duncan.
Christopher Lane was gunned down while jogging along a quiet street in Duncan in 2013.
17-year-old Chancey Luna is accused of firing the deadly shot.
Prosecutors say Luna picked the victim at random.
After selecting a jury, prosecutors called a key witness to the stand.
James Edwards Jr. was riding in the car with Luna and a third teen at the time of the shooting.
Edwards told the jury Luna pulled the trigger, but claims Luna later said he thought the gun was loaded with blanks.
That is the heart of the defense's case. They claim Luna did not intend to kill Lane.
"They're trying to prove it wasn't premeditated and it wasn't. He wasn't that kind of kid," said Luna's mother Jennifer Luna. "I feel sorry for the Lane family, but this is my child too."
If convicted, Luna faces a life sentence.
Edwards is charged as an accessory to the crime.