Savannah Leigh Pruitt
The FBI has joined local authorities in the search for missing teen Savannah Leigh Pruitt, expanding the investigation to four states. Law enforcement officers walk out of the J. Edgar Hoover FBI Building on January 28, 2019 in Washington, DC. Last Friday President Donald Trump signed a temporary measure to reopen the U.S. government after it was partially shut down for 35 days as the president and congressional Democrats could not come to a bipartisan solution for more money to build a wall along the U.S.-Mexico border. Getty Images/Mark Wilson

New details have emerged in the case of missing 14-year-old Savannah Leigh Pruitt with the search expanding to four states: Tennessee, Kentucky, Georgia and Missouri.

Pruitt disappeared from her home in Madisonville, Tennessee, on Jan. 13, after she was last seen by her mother heading to bed at around 11 p.m. to 11:30 p.m., according to authorities.

Since disappearing two weeks again, her cellphone pinged in Corbin, Kentucky -- 140 miles away from her Tennessee home. According to investigators, Pruitt’s had two cellphones, and they both pinged in Corbin, Kentucky, between 5:15 a.m. and 5:30 a.m. on Jan. 14.

"Both phones were powered off at that point and there has not been any activity on either phones since that early morning hour of Jan. 14," said Jason Fillyaw, a Monroe County Sheriff's Office detective.

Pruitt’s parents, Randall and Christine Pruitt, told ABC News that their daughter and family do not know anyone that lives in Kentucky. The Pruitt family recently moved to Tennessee from Georgia, Randall told the news outlet.

“Right now we're still treating this as a missing-persons investigation,” Fillyaw said. “All the leads that we've searched for at this point have kind of hit dead ends. We’re seeking, you know, any tips or information from the public at this time."

Pruitt's younger sister first discovered she was missing on Jan. 14 at around 5 a.m. Her window was found to be open, and her clothes and sheets were missing, according to investigators.

No activity has been reported on Pruitt’s social media accounts since her disappearance and investigators do not believe the girl ran away.

When talking about their daughter, Randall told ABC News that, “She brought the sunshine up in the morning, I mean, just like having your cup of coffee. ... Life's just not the same without Savannah.”

"She was our life. ... And our life is gone," Christina told the news outlet.