The man will no longer stand trial for the rape of the teenager, reports Sveriges Radio Jönköping.
The girl came into contact with the man after she started having trouble at school and began suffering from psychological problems.
When the girl was at her lowest ebb she sought contact with the 42-year-old, who is alleged to have supplied her with drugs.
He is also alleged to have raped her repeatedly over the course of last year, when the girl was only 14-years-old.
The case against the man was based on the testimony of the teenager. Her death now means that the case will be closed and the man will no longer stand trial.