TALLAHASSEE, Fla. (WCTV) – Brad Casalvieri, 30, has been arrested for allegedly sex with a student.

Casalvieri is a biology teacher and football coach at Leon High School. However, authorities say the charges stem from Casalvieri’s time at Lincoln High School, where he was also a teacher and coach.

Deputies at the Leon County Sheriff’s Office say they got an anonymous tip. They ultimately discovered enough evidence to charge the seemingly beloved teacher.

Word has been spreading fast at Leon High School about one of their favorite teachers.

“I don’t believe it,” Said A’Nylah Cobb, a 9th grade student at Leon High.

A’Nylah says the man who teaches her Biology honors class can’t be the man charged with having sex with a student. “He’s not that type of person. I don’t think he’s that type of person to do stuff like that. He was just too nice. He’s always smiling and stuff. He’s funny.”

Investigators say Casalvieri had an ongoing sexual relationship with a student while working at Lincoln. Deputies say it lasted from June 2015 through February 2016.

Stephanie Edwards’ is a concerned parent. Her daughter is a sophomore at Lincoln. She said, “Oh, my goodness, that is definitely crossing the line. I am extremely sad to hear that.”

Deputies say they have evidence of 24 sexual encounters between Casalvieri and the student. At least one of those encounters was on school grounds, the others were off campus, according to deputies.

Carolyn Rucker’s granddaughter goes to Lincoln. She said, “It reminds me of several of the old cases. That’s been a while, so if it’s still going on, they probably need to try to do something to fix it.”

Chris Petley, the Leon County Schools Spokesperson, said, “The safety and security of our students is and always will be our top priority. Every Leon County employee has to undergo a level two background check. Additionally, coaches go through an annual ethics review training program.”

A part of the background check consists of fingerprints being submitted for statewide and federal criminal checks.

School officials confirm Casalvieri was immediately suspended without pay pending the outcome of the investigation.