Stills from the video, which Facebook has taken down, identify a so-called "Beam Team" as the broadcasters.
They are known to many in the neighborhood."Every time we mention this group, the 'Beam Team' every time we mention them you can see the fear overcome them.
Sexually violent people are required to register every 90 days for natural life.
Public Act 97-0578 became effective January 1, 2012 which requires retroactive registration for sex offenders.
Those close to the investigation said Facebook's facial recognition software helped police pinpoint the individuals in the video.
The teen's mother said Wednesday her daughter was released from the hospital.
As Chicago police continue to work to try and identify the boys seen sexually assaulting a 15-year-old girl on Facebook Live over the weekend, the girl's mother told the Associated Press that the family is getting online threats and her daughter refuses to go home.
Police meanwhile said they "have teams working around the clock and detectives are making good progress in the case." Police also said there is now a parallel investigation going on into the online threats being received by the family of the 15-year-old.
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Today on Essence Live, our kitchen table talk series is back and we're talking all about sex, what's your freak number, what is your sexual deal breakers, and are one nite stands still a little taboo? M, M, cooking up some tasty treats and a special sweet potato vodka from the Empower Cocktail company. Right I think mutual attraction is super important and great conversation. Cuz I feel like when I was in college there were some things I wouldn't have really said. But what about when you do stuff that you need to know some type of confirmation, like I won't just put my thumb in your ****, because that's something you should ask, or... I have to ask though, can you take criticism in the moment, fellas?
We've got special guests some drinks and some tasty bytes from our chef, get ready because this is a conversation you do not want to meet, Essence Live starts now [MUSIC] Welcome to Essence Live's Kitchen Table Talk series. So you know it's about to get real interesting up in here. We're talking about sex, there's no way to ease into this. A sex offender or sexual predator, who has never previously been required to register under the Illinois Sex Offender Registration Act, has a duty to register if the person has been convicted of any felony offense after July 1, 2011.