They say Byrns started communicating with the girl through Playstation games, posing as another teenage girl.
The TV station spoke with the girl's mother earlier on Sunday and she said her daughter had been in communication with a person online who lives in IL. "We believe that's how the initial contact was made", said Sergeant Brandon Ragan.
Johnson's parents said they were aware their daughter was talking to an individual from IL, but did not know she was in danger at the time.
"This is someone that she's been communicating with online under the guise of being a female and basically has just pulled her into a trap, so to speak", her father said.
Orange County Sheriff's Office reported the girl as an endangered runaway at about 9 a.m. Sunday. We hope that justice prevails in this case.
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Paul Manafort (2nd L) arrives at a federal courthouse with his attorney Kevin Downing (R) in Washington, DC, on November 2, 2017. Mueller has accused Manafort and Gates of secretly funneling $4 million through offshore accounts to pay for it.
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The 11-year-old, Alice Amelia Johnson, was found in Georgia after vanishing from her Orlando home on Saturday night.
Demings says the two met online through a video game.
Byrns is being held at the Bibb County Law Enforcement Center and is expected to be charged. She appeared to be in good condition and "okay from a physical standpoint".
"In this case, this individual on the other end (was an) adult male who is a child sexual predator and that's all of our worst nightmares", police said.
"I would say she's lucky to be alive".