Amber Alert
This representational picture shows police and SWAT officers carrying two boys to safety after an Amber Alert vehicle was stopped on a freeway exit ramp in Santee, California Dec. 11, 2014. Reuters

As Tennessee law enforcement officials continue to search missing teen Elizabeth Thomas, new details have emerged about her teacher Tad Cummins, who is suspected of kidnapping her. A former student, Destany Parrish has revealed that Cummins sang a love song to her when she was about 15-years-old.

In an interview with CBS’ Inside Edition, the now 19-year-old Parrish said she and Cummins “used to be really, really close.”

“I could talk to him about just about anything. He was somebody I could go to and not have to worry,” Parrish said, adding Cummins arranged for them to be alone when he sang the song.

“We were in the music room right next to his classroom and I had learned a new song on the piano and I was going to show him, but he sat down first and played that song,” Parrish told Inside Edition.

Tennessee Bureau of Investigation (TBI) launched an Amber Alert earlier this month for 15-year-old Elizabeth after she went missing on March 13. The bureau listed Cummins under Tennessee’s “Top 10 Most Wanted” and issued a warrant against him for kidnapping and having sexual contact with Elizabeth, who went to Culleoka Unit School in Maury County. The school, where he worked as a health science teacher, fired him after the alleged kidnapping.

In a March 23 interview to NBC-affiliated WSMV.com, Parrish revealed she considered Cummins her close friend and “trusted him with everything.”

"Everybody loved Tad," Parrish told the local news outlet. "He put inspirational quotes on his board. He was still doing it when I went back and visited him some time last year. He was always just really friendly. I never thought for a second that it was anything else."

However, Parrish recalled one incident with Cummins when he told the rest of the students to head to the lunch room after an alleged complaint from the principal.

"He told us all one day that the office had gotten on to him and that we all had to go back to the lunch room because that's where we're supposed to be anyway," Parrish told WSMV.com. "Everybody left and I got my bag and got ready to leave, and he said the office hadn't said anything to him, he just didn't want that many kids in his room. It just ended up being he and I chilling in there. I would go there after school.”

On Tuesday, Tennessee Bureau of Investigation (TBI) said the officials suspected Elizabeth and 50-year-old Cummins may have gone to Mexico. The bureau also tweeted a Spanish translation of Elizabeth's missing poster Wednesday.

Meanwhile, Elizabeth’s sister Sarah Thomas said Wednesday she knew something was wrong.

“She [Elizabeth] said, ‘I’m going to be gone,’ ” 17-year-old Thomas told People magazine in an interview. “She had a strange edge to her voice. She said, ‘I’m going to get back at 6 tonight. If I’m not back by 6, call the police and come find me.’”

TBI is seeking help for information on the missing student and teacher. The bureau is offering a $1,000 reward for information leading to the teacher’s arrest.