He has been charged with transporting a minor across state lines for criminal sexual intercourse, according to Jack Smith, the acting US attorney for the Middle District of Tennessee.
The 15-year-old has since undergone rehabilitation, treatment and has spent the last few days getting re-acquainted with loved ones and friends.
Authorities said Elizabeth has since been reunited with her family and was being evaluated for emotional trauma.
"The first thing I did was just start it and she went into it", he said, adding it was the first time he saw his sister smile.
Cummins is charged in Siskiyou County, CA, with kidnapping and possession of stolen property.
Federal prosecutors in California, arguing against pre-trial release for Cummins, said the former teacher "planned and executed an audacious scheme" which would culminate in him taking Thomas to Mexico and points farther south "to further his own prurient desires".
Cummins is scheduled to appear in federal court in Sacramento Monday afternoon. The charge carries a minimum of 10 years.
"She told us she didn't have access to telephone, internet, any electronic devices".
Elizabeth's father, Anthony Thomas, told ABC News after Elizabeth was found, "She may not be exactly. the person she was because there's a lot of experiences she's had". "You're speechless", Bozeman said. "She's just so happy to get food and coffee and showering".
Cummins, 50, was ordered Monday to remain in custody and be returned to authorities in Tennessee.
Cummins also faces state charges of aggravated kidnapping and sexual contact with a minor.
"She was abducted and she's grateful to be home", she said.
A former Tennessee teacher accused of kidnapping his teenage student wanted to flee to Mexico with the girl, federal prosecutors said Monday.
Surveillance images showed them at a Walmart in Oklahoma City on March 15.
Siskiyou County deputies formed a perimeter around the 12-by-12-foot cabin for several hours that night before drawing Cummins out the next morning to arrest him. Cummins was arrested outside of a secluded cabin in a remote part of northern California Thursday.
The student who reported the kissing said she confronted Cummins, who was a teacher at the school.