I guess we know now.
“An employee brought these 2013 events to our attention in June 2020,” a spokesperson for Activision Blizzard told Kotaku when asked about the “Cosby Suite” images and allegations against Afrasiabi. “We immediately conducted our own investigation and took corrective action. At the time of the report, we had already conducted a separate investigation of Alex Afrasiabi and terminated him for his misconduct in his treatment of other employees.
Source