https://arstechnica.com/information-technology/2021/04/in-epic-hack-signal-developer-turns-the-tables-on-forensics-firm-cellebrite/

Signal Creator PWNS Cellebrite:

“Marlinspike said he obtained the Cellebrite gear in a “truly unbelievable coincidence” as he was walking and “saw a small package fall off a truck ahead of me.” The incident does seem truly unbelievable. Marlinspike declined to provide additional details about precisely how he came into possession of the Cellebrite tools.”