The girl's mother was told by an uncle that her daughter looked to be the subject of a gang rape video on Facebook.
The Associated Pressreports that the girl was apparently raped "by five or six men or boys" in the video, which was watched live by dozens of people.
It is the second time in a less than three months that the department has investigated an apparent attack that was streamed live on Facebook.
Uber president Jeff Jones resigns
Liane Hornsey, Uber's new head of human resources, said more than 100 "listening sessions" had taken place across the company. His team is collecting information through interviews and anonymous tip lines, with findings expected at the end of April.
CBS 2 no longer is identifying the girl, because police have said she is the victim of a sexual assault, and because she has been found.
The high school freshman went to the store on Sunday afternoon, but her mother became concerned when she did not return home, WGN said.
Superintendent Eddie Johnson said that several people had viewed the video on social media but did not notify police. She showed him screen-grabbed photos of her daughter, reporting that her daughter had been missing since Sunday.
Chicago police also say they contacted Facebook to take down the video immediately, which they did.
"Here's what's even more disturbing, more than the fact that they did this, there were so many people that saw it and didn't pick up the phone to dial 911", Johnson told the TV station.
According to investigators, none of the roughly 40 people who watched the video called authorities. "That's just not right", he said.
Asian stocks climb after Fed move; dollar drops: Markets wrap
Earlier, MSCI's broadest index of Asia-Pacific shares outside Japan jumped 1.2 percent to its highest level since mid-2015. Dow Jones closed down by 0.09 percent, S&P 500 ended down by 0.18 percent, Nasdaq finished the day down by 0.03 percent.
Spicer said reporters have jumped to conclusions and falsely assumed in some instances that the president was golfing. Spicer was asked Monday at a White House press conference how Trump's golf playing is "any different", from Obama's.
Prices hovered just below the Thursday session high, when the metal reached US$1,233.13, its highest since March 6. The WSJ Dollar Index was up 0.1% on the day and had fallen roughly 1% right after the Fed's decision.
Yahoo's email news came up the same week that the company announced that it is spinning off its main Internet business. A separate investigation is underway into alleged cyber-meddling by Russian agents in the USA presidential election.
Were the game a Hollywood script, someone would have flipped a switch and had Princeton start knocking down shots from deep. In one of the biggest games of Princeton's history, the Tigers gave Notre Dame everything they had and came up just short.
A Netflix spokesperson told CNN that the feature is one of "hundreds" of tests that the company conducts each year. For those that don't want to sit through a minute or two of opening credits on TV shows, Netflix has you covered.
All three representatives are members of the House Freedom Caucus, a conservative group that has come out against the AHCA. The RSC also was told that states were given the option to receive block grant funding rather than per capita funding.
The first weekend is the best as there are potential upsets to intrigue me even though the favored higher seeds generally prevail. The program won an NCAA Tournament game for the first time since advancing to the Elite Eight and losing to Stanford in 1998.
The SNP claims Scots should be given another say on independence to stop the country being dragged out of the Brussels bloc "against its will".
Ivanka Trump brand sued for 'unfair' competition
But Gorelick said the goal of the trust wasn't to shield Trump from everything, but to remove her from the day-to-day operations. Thus far her influence has been from the outside in, and any involvement has been unofficial .
Manipur CM N Biren Singh to face floor test today
The Congress had emerged as the largest party in the state winning 28 seats, however the party fell short of majority. Manipur Chief Minister Nongthombam Biren Singh will be facing the crucial floor test in the state Assembly today.
Thailand turtle that ate 5 kg coins died
Piggy Bank's shell was cracked, swollen and infected when she was found, leaving her rescuers anxious that she had a tumour. Omsin, a 25-year-old turtle who underwent surgery to remove 915 coins from her stomach , has sadly died.
HSBC 'processed £435m of laundered Russian cash'
The trail found that HSBC had processed $545.3m (£441m), RBS $113.1m (£91m) and Coutts $32.8m (£26.5) of Laundromat cash. The paper also claimed that maybe as much as £65bn has been moved from Russian Federation between 2010 and 2014.
Brexit: Article 50 will be triggered next week
It's not the first time that a "transitional" deal has been mentioned but this has always been followed by other controversies. A fifth said they would not relocate any capacity, and 3 percent planned to increase United Kingdom operations.
Syria: Government forces retake Damascus - SANA
The Islamist Faylaq al-Rahman rebel group and the Fateh al-Sham Front have a presence in the area, the Observatory said . Infantry and tank reinforcements arrived on the government side to repel the attack in the afternoon, the group said.
Marshfield and Rapids JC Penney to close
For those who will not be relocated, the company said they will provide outplacement support services "for eligible associates". The liquidation process is expected to start April 17, with most of the closures completed in June, the release stated.