I ragazzi del muretto - Season 1 Episode 7 Sospetti

As the kids enter the classroom, someone holes up in the school bathroom. Meanwhile Johnny takes blood tests and soon after arrives late to school. The janitor, after seeing him go by, finds a syringe in the bathroom and suspects him. Furthermore, the gymnastics teacher punishes him for being late and the boy, due to the blood sample, faints in front of him, allowing him to see the holes in his arm.