The woman, a former science teacher, is accused of having an inappropriate relationship with one her students.
Police say the relationship between the pair reportedly began with after-hours texting that escalated to them having a sexual relationship.
Fosgett according to a report via patch resigned from her job Wednesday, one day after being placed on leave by the school district.
Read a statement that was released on Murrieta Valley Unified School District’s site after school officials notified concerned parents of a pending investigation: ‘The teacher is on administrative leave and she will be out of the classroom indefinitely pending the outcome of the investigation,’
‘As with every district employee, all the appropriate background checks were conducted prior to her being hired.’
According to a police statement, the alleged relationship came to light after it was brought to school officials by other students.
‘The minor told detectives that one of his teachers began showing interest in him over a year ago, which started with after hour texting,’ the statement read.
‘As the relationship grew, the minor and the teacher engaged in oral sex and ultimately sexual intercourse.’
She was arrested Friday and charged with one count of unlawful sexual intercourse with a minor under 18 and two counts of oral copulation with a minor.
Fosgett has been released on $40,000 bail and she is scheduled to appear in court January 29, 2016.
A recorded phone call and email sent home to parents from school officials Tuesday notified them of the investigation.
One of Fosgett’s former students told KTLA that she was ‘shocked‘ by the allegations.
Told the student: ‘I heard rumors, but I didn’t really want to believe them … I still kind of don’t want to believe them, because it seems really out of character for her.’
She added that Fosgett was a ‘really good teacher’ who helped her when she was struggling academically.
At present it is not necessarily understood why the science teacher preyed on the student and whether there are other victims?
Anyone with information about the case has been asked to call Murrieta police at 951-696-3615.