"Investigative measures demonstrated that the Afghan suspect met the offender immediately before the crime in the place where the shooting occurred later. There is an assumption that the detained know that the shooter had a Glock 17 gun," Thomas Steinkraus-Koch told reporters.
Steinkraus-Koch said, at a briefing streamed live on the Munich police official Facebook account, Sonboly met the witness at a psychiatric ward in the summer of 2015. There, the Afghan teenager learned of the suspected shooter's interest with Anders Breivik, the Norwegian mass shooter on whose anniversary the Munich mall rampage took place.
The spokesman added that investigators were able to recover an encrypted WhatsApp conversation the witness had deleted shortly ahead of the shooting.