True Romance, Pt. 1

S3, E6: Fitz takes some teaching work at the University where he begins receiving love letters. Janice, a lab technician, is the writer of the letters. She receives no attention from her father who is focussed on her sister's wedding and in her depression begins murdering male students she has lured into her room. The police want to take Fitz off the case as they believe that the murderer is writing, and killing, for him.