The 911 call made by the woman who found Australian baseballer Christopher Lane shot dead on the side of the road in Oklahoma has been released by US authorities.
Mr Lane, 22, was shot in the back while jogging on a street in the small town of Duncan on Friday.
Three teenagers aged 15, 16 and 17 have been and remanded in custody.
Police allege they spotted Lane running past, got into a car and followed him before shooting him in the back and driving off.
The district attorney in Duncan has released audio of the emergency phone call which reveals the final moments of Lane's life.
The call was made by a passing motorist who pulled over when she saw Lane lying on the side of the road.
Initially she did not want to intervene, saying she was scared to approach him.
"There's a young man, he's just fell over in the ditch, and he's got blood on him. I'm afraid to go over to him, I don't know him," she said.
"He's got blood on his back. He is in the ditch."
She then she went to Mr Lane's assistance.
"Tell them to hurry. He said he's been shot. He said he heard the shot and he knows what the guy looks like," she said.
The caller said she found Lane breathing with difficulty, and then she said he was turning blue.
"I want to hear some sirens. Where are they?" she said, the first of many questions about when emergency services would arrive at the scene.
When asked if he was still breathing, she replied: "Barely."
Mr Lane, from Melbourne, was on a baseball scholarship at East Central University and was reportedly two weeks away from celebrating his 23rd birthday.
The three teenagers, described by district attorney Jason Hicks as "cold and callous", will appear in court again in October.
James Francis Edwards, 15, and Chancey Allen Luna, 16, have been charged with first-degree murder.
Michael Dewayne Jones, 17, who allegedly drove the vehicle carrying the other suspects, was charged with use of a vehicle in the discharge of a weapon and accessory to murder after the fact.
According to police, Jones said he and the other boys saw Mr Lane jogging and decided he would be their target.
He said they had decided to kill someone "for the fun of it".
Police said the three followed Mr Lane in their vehicle and Luna shot him in the back.
The vehicle's boot contained a shotgun with the serial numbers sanded off, but the actual weapon used in the shooting has not been found, police said.