The investigation partly relies on notes seized from the defendants which mention various privacy tools: GrapheneOS, LineageOS, Signal, Silence, Jitsi, OnionShare, F-Droid, Tor, RiseupVPN, Orbot, uBlock Origin…
According to investigators: "these elements confirm they were willing to live clandestinely".
According to the prosecution: "these notes consituted a real playbook allowing anonymous use of a phone, showing the person was willing to live in secrecy and hide their activities".