The district court of Wiesbaden near Frankfurt found Ali Bashar, guilty of raping and murdering the girl in May 2018, according to Der Tagesspiegel newspaper.
The verdict, for instance, says that given the gravity of the crime the 22-year-old defendant will not have an opportunity to be released on parole during the first 15 years of his sentence.
Ali Bashar reportedly admitted the murder during the trial but denied the rape charge.
According to media reports, the police found during the investigation that after the crime Ali fled to northern Iraq with several family members, but then Kurdish security forces arrested him and extradited to Germany, though the two states do not have a formal extradition treaty.
The widely-publicised case has provoked mass criticism toward the migration policy implemented by the government of German Chancellor Angela Merkel, in particular, the principle of open borders.