The pair disappeared as a police investigation into their relationship was heating up.
January 31 - School administrators were notified by law enforcement that Cummins was the subject of a criminal investigation. Cummins surrendered without incident.
The TBI is planning a 3 p.m. news conference in Nashville. "Our Intelligence Analysts and Agents have worked tirelessly since issuing this AMBER Alert to process more than 1,500 leads from all 50 states".
Cummins, 50, was wanted on allegations of aggravated kidnapping and sexual contact with a minor. He didn't buy "anything else of significance", the TBI said.
A BOLO, or be on the lookout was issued for both Cummins and Thomas. The FBI was also called in to help with the search.
15-year-old Elizabeth Thomas was found unharmed and will be returned to her family back in Tennessee.
March 18, 2017: About 100 people gathered at Riverwalk Park for a candlelight vigil for Elizabeth Thomas. The report also recommended that the administration monitor Cummins' classroom to make sure students weren't there when they weren't supposed to be. "Thanks go to all who have kept the message of finding Elizabeth Thomas and working on her safe return as top-of-mind throughout the nation". But we got her back again.
They disappeared after a friend dropped off Thomas at a Shoney's restaurant in Columbia, Tennessee the morning of March 13. The teen's brother urges the public to keep sharing his sister's photo.
January 27 - Thomas was removed from Cummins' class.
Maury County Schools released a timeline of their investigation.
TBI spokesman Josh DeVine said they notified authorities in Siskiyou County, who had "challenges to overcome" in locating the pair.More news: 'Every country protects, for good reason'; Trudeau defends Canada's trade practices
The school begins investigating the allegations of the kiss.
Cummins had been suspended and later fired from Culleoka Unit School for his alleged sexual relationship with the teen.
March 24 - Cummins' coworkers offered a reward in AMBER Alert.
Barry said Cummins and Thomas were looking for the Black Bear Ranch Commune but were flat broke and out of gas.
Cummins' wife, Jill files for divorce, alleging irreconcilable differences have arisen and exist between her and her husband.
They were spotted in Oklahoma city after the disappearance, where surveillance footage showed them purchasing food items in the store with cash.
Cummins appeared to have darkened his hair and Thomas may now have red hair.
"We love you and we can't wait to see you and it's fantastic".
The main concern is for her emotional well-being, TBI Director Mark Gwyn said.
"I don't even want to think about Tad".
Barry said on Thursday that Cummins and Elizabeth showed up Tuesday.