One of the Oklahoma teenagers accused of killing 23-year-old Australian baseball player Christopher Lane previously posted images online showing himself posing with guns and wads of cash.
And three days before what police call the indiscriminate shooting, the suspect, 15-year-old James Edwards Jr., tweeted, "With my n****s when it's time to start taken life's" -- a line from the Chief Keef rap song, "I Don't Like."
Back in April, he tweeted, "90% of white ppl (people) are nasty. #HATE THEM."
Police in the town of Duncan have charged Edwards and Chancey Luna, 16, as adults with first degree felony murder, said Kaylee Chandler, a Stephens County court clerk.
Michael Jones, their alleged 17-year-old driver, faces two charges: use of a vehicle in the discharge of a weapon and accessory after the fact to murder in the first degree.
A judge set bond at $1 million for Jones and no bond for Edwards and Luna, Chandler said.
Police say it was Jones who ultimately told them, "We were bored and didn't have anything to do, so we decided to kill somebody."
The police affidavit lists Edwards and Chancey as black, and Jones as white.
Edwards' older sister said Thursday she finds it hard to believe her brother would ever post online messages about killing and hate.
"I know that he has a lot of Caucasian friends with whom he hangs with," Rachel Padilla told CNN's "Erin Burnett OutFront" from her home in Duncan. "The only way that I would feel that he would say anything racist about anybody is because that we have felt racism from some of the people here in the community of Stephens County."
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.
Case triggers political, racial questions
The seemingly senseless killing has left many Americans disgusted. And for some, it triggered a political question with racial overtones in the wake of the polarizing Trayvon Martin case, in which an unarmed black teen was killed by a neighborhood watch volunteer who claimed self-defense. The acquittal of George Zimmerman, who describes himself as Hispanic, infuriated many people and triggered protests around the country, as well as remarks from President Barack Obama.
Now, some Americans are asking why this killing, in which the victim was white and the alleged killers black, has not brought reaction from the president.
The conservative news website townhall.com complained Wednesday that the Rev. Al Sharpton, a prominent civil rights figure, and the president, "who quickly opined on the George Zimmerman self-defense case against Trayvon Martin, are silent. Not only should they be publicly condemning the alleged killing, which is now an international incident, but they should be asking why the hell these teenagers were 'bored' in the middle of the day. Where were their parents? Where is Sharpton when it comes to condemning young black men joining gangs, as these three did?"
At the White House, spokesman Josh Earnest said Wednesday he was not familiar with the case. When asked why the president had not weighed in on it, he noted that when Obama spoke of the Trayvon Martin case, he also spoke in general terms "about the impact of violence in communities all across the country."
A look at Sharpton's Twitter feed and transcript from his August 21 program did not show any mention of Lane's death.
Thursday, the Rev. Jesse Jackson, another well-known civil rights figure, and his Rainbow PUSH Coalition issued a statement referring to both the killing of Christopher Lane and the recent beating of a white 13-year-old boy by three black teenagers on a school bus in Florida.
The incidents call "each of us to a (sic) collectively resist all forms of violence in our society," he wrote.
"In particular black on black violence that disproportionately affects every facet of black life in America. These horrific episodes that leave all rationally thinking people appalled and others feeling paralyzed cannot be addressed by our silence and or abdicating our personal responsibility. We urge all persons who believe as we do in the (Martin Luther) King principle of peace all over the globe to rise to the challenge to pursue and promote peace and its principles. We must learn to live together in peace or we will most assuredly die apart in our own neglect."
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.