This is the 1458th most frequent Swedish word.
gärningsmannen
"The perpetrator" or "the offender."
The word "gärningsmannen" is used here as a subject to describe the person who committed the crime.
Gärningsmannen greps av polisen på brottsplatsen.
The perpetrator was arrested by the police at the crime scene.
The word "gärningsmannen" is used here as a subject to specify the person observed leaving.
Enligt vittnen lämnade gärningsmannen platsen i en svart bil.
According to witnesses, the perpetrator left the scene in a black car.
In this sentence, "gärningsmannen" is a target; it refers to the person being sought after for committing a crime.