Police arrest 14-year-old over sexual assault on Facebook Live
A 14-year-old boy has been arrested over the sexual assault of a 15-year-old Chicago girl that was streamed live on Facebook.
Chicago police spokesman Anthony Guglielmi said the suspect faces felony charges of aggravated criminal sexual assault, manufacturing of child pornography and dissemination of child pornography.
"Additional arrests are expected as the investigation continues," Mr Guglielmi said.
Police Superintendent Eddie Johnson is expected to provide more details at a news conference on Sunday morning.
Mr Guglielmi has said police were not aware of the attack in mid-March until the girl's mother approached Mr Johnson as he was leaving a police station in the city's West Side and showed him the video.
Mr Guglielmi said the police chief was "visibly upset" after he watched, both by the video's content and the fact that there were "40 or so live viewers and no one thought to call authorities".
Police have said the attack involved five or six males.
The girl's mother said last month that her daughter had received online threats after the attack. The Chicago Sun-Times later reported that the girl's family had been relocated.
It is the second time in recent months that Chicago police have investigated an apparent attack broadcast live on Facebook. In January, four people were arrested after a video showed them allegedly taunting and beating a mentally disabled man.