911 call: 'If you don't hurry, he's gone'
Lane was a promising young athlete, living his dream of studying in the United States on a baseball scholarship.
The people of Duncan, an affluent town of fewer than 25,000 people, welcomed him.
Lane had gone out for a jog just at the time the teens had decided to find someone to kill, police say.
They drove their car behind him and opened fire, hitting him once in the back, authorities say.
He staggered across the road and fell to his knees, then managed to get up and take a few more steps before collapsing for good.
A woman who saw him struggling called 911. As she waited for an ambulance, the young man started to turn blue.
"If you don't hurry, he's gone," the woman warned.
The paramedics who arrived couldn't save Lane, and he was pronounced dead at a hospital.
He was "the most amazing person I've ever met," his girlfriend, Sarah Harper, told CNN's "AC360" on Wednesday. "He was the most genuine and kind-hearted guy and would do anything for anybody at any time and ... made everyone feel special."
"There is no way to describe what happened," she said. "It's the hardest thing you could ever imagine happening. ...There is still a lot of shock and disbelief, and a lot of anger and sadness."
"You can't make sense of it," she added. "It's just -- so surreal that anybody could do something like this."
Security camera, call to police aided investigation
Immediately after the shooting, witnesses gave police a general description of a black car. Security footage from a nearby Mexican restaurant showed what could have been the car. But hours passed with no sign of whether there would be another killing.
Then, four hours after the shooting, a man called police, saying he could see three juveniles with guns -- and they apparently want to kill someone, said Duncan police Chief Danny Ford.
Officers responded to a home and found the car in a church parking lot across the street from the caller's house. The suspects were inside, and they provided enough information to be arrested.
Two days later, Edwards offered details about the case, police said. The teens had been inside a house when Lane ran by, and the group decided he'd be the target -- as a way to cure their boredom, Ford says.
Call for U.S. tourism boycott
The case has triggered fury among many people in Australia.
"It is another example of murder mayhem on Main Street," former Australian Deputy Prime Minister Tim Fischer told CNN's Piers Morgan.