Cosa avete fatto a Solange? (1972)

Director: Massimo Dallamano
Studio: Italian International Film, Clodio Cinematografica, Rialto Film Preben-Philipsen

Starring: Fabio Testi, Cristina Galbo, Karin Baal, Joachim Fuchsberger, Gunther Stoll, Claudia Butenuth, Camille Keaton, Maria Monti, Giancarlo Badessi, Pilar Castel, Giovanna Di Bernardo, Vittorio Fanfoni, Marco Mariani, Antonio Casale, Emilia Wolkowicz

Description:
—After several coeds are murdered at a college, a professor (Fabio Testi) who is involved with a student becomes a suspect, along with several other male and female teachers.
—In London, the Italian gym teacher Enrico ‘Henry’ Rosseni is having a love affair with his eighteen year-old student Elizabeth, who is the niece of the owner of the Catholic school where he works and she studies. His estranged wife, Herta is the Music and German teacher. One day when Enrico and Elizabeth are in a boat in a grove, she sees a man hunting down a woman. Enrico believes she’s making it up, but the next morning, he learns a teenager was murdered in the river bank in the grove. Inspector Barth goes to the school since the victim Hilda studied there and soon, Enrico is the prime suspect, though Elizabeth could give an him an alibi. When a second student’s murdered, and then so is Elizabeth, Enrico decides to investigate, and teams up with Herta to find the of the mysterious Solange, but what might have happened to Solange?
—A teacher who is having an affair with one of his students takes her out on a boat. They see a knife killing on shore. Other gruesome murders start occurring shortly thereafter, and the teacher suspects that he may be the cause of them.

Alternative Titles:
What Have You Done to Solange?
Jeux particuliers
Das Geheimnis der grunen Stecknadel