DUNCAN, Okla. -- One of the Oklahoma teenagers accused of killing an Australian college baseball player sent out at least one racist tweet in recent months.
That's fueling speculation that the shooting death of Christopher Lane as he was out for a jog last Friday may have been racially motivated.
In April, the youngest of the three suspects,James Edwards Jr., 15, tweeted out the following tweet:
"90% of white ppl are nasty #HATE THEM."
Edwards' sister, Rachel Padilla, said she doesn't believe he is racist.
"I know that he has a lot of Caucasian with him he hangs with and the only way I would feel that he would say anything racist about anybody is because we have felt racism from some of the people here in the community of Stephens County," said Rachel Padilla.
Padilla said her brother has been in trouble with the police before for fighting, but she said he's never been a vicious person and she would never have thought he could kill someone. She said Edwards "hung around older people that were affiliated with gangs" but she doesn't know if he was in a gang himself.
Three days before Lane was murdered, Edwards tweeted:
"With my n***s when it's time to start taken life's"
It's a line from the Chief Keef rap song, "I Don't Like."
Two other teens, Chancey Lunca, 16, and Michael Jones, 17, have also been charged in the killing. The police affidavit lists Edwards and Chancey as black, and Jones as white.
Shortly after the arrests, police say the teens admitted to killing Lane out of boredom.
"He basically said we were at the house, the young man run by the house, someone said there's our target, they got in car, followed him and shot him. We were bored," said Chief Danny Ford with the Duncan Police Dept.
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."
Jones reportedly told police where they tossed the gun, but when investigators searched the apartment complex they did not find it. They did find ammunition hidden in their car and a shotgun hidden under the spare tire.
"There's no way to describe what happened. I mean, it's the hardest thing you could ever imagine happening," Harper said.