A Foothill Ranch Middle School teacher was arrested Tuesday for molestation charges. Mysti Lingenfelter, 38, was put on leave in May of 2015 after allegations surfaced that she had an inappropriate relationship with a student during the 2011-12 school year. The male student was said to be 14 years old at the time. Once the Sacramento County Sheriff’s Department wrapped up its investigation, a warrant was issued for Lingenfelter’s arrest. She was booked into jail on charges of lewd acts on a child of 14 years olf and oral copulation with a person under 16 years of age.