A former Walker high school teacher is behind bars after a 15-year-old student told police he had a sexual relationship with her.

Walker Police arrested Lynsie Pousson Pendarvis, 33, on Thursday at the end of a week-long investigation into her relationship with a male student attending Walker Freshman High School, Walker Police Captain John Sharp said in a department release.

Officers initiated a preliminary investigation after receiving information from a “reliable source” about an inappropriate relationship between Pendarvis and one of her students, Sharp said.

An interview with the student and his parents revealed that Pendarvis had engaged in a sexual relationship with the boy, who had informed his parents of that fact shortly before the interview, Sharp said. Police obtained a warrant for Pendarvis’ arrest Wednesday and discovered that Pendarvis, of Livingston, was staying in Hattiesburg, Mississippi.

Superintendent John Watson said Pendarvis submitted her resignation June 9; she worked at the school for roughly two years.

Hattiesburg authorities took her into custody without incident. A Walker officer took custody of Pendarvis on Thursday morning, and she was booked into Livingston Parish Detention Center on counts of carnal knowledge of a juvenile and indecent behavior with a juvenile.

Watson said the school will fully cooperate with law enforcement during the case.

“The safety and well-being of our students is our number one priority,” Watson said. “We’re very protective of our students.”

Pendarvis’ bail is set at $100,000, the release notes.

No details about the case were released Thursday.