The prosecution and defense agreed that the attack originated from Caffrey's computer.[36] Whilst Caffrey admitted to being a "member of a hacker group",[37] Caffrey's defense claimed that, without Caffrey's knowledge,[38] attackers breached his system[4] and installed "an unspecified Trojan…to gain control of his PC and launch the assault"[39] and which also enabled the attackers to plant evidence on Caffrey’s computer.