Just in the interest of being thorough (because I'm not at all interested in his guilt or innocence), there seems to be some confusion about the IP address:
"As Keys tells it, he was merely gathering information as a journalist about Anonymous, but did not have his IRC handle registered—so, he supposes, someone else, using an entirely different IP address, was using that nickname instead."
"'That was one of several names that I used, but it wasn't locked down, it wasn't registered and it looks like somebody did use it. It was connected to an IP address that wasn't mine. The FBI agent admitted that he didn't have any records of [that IP address].'"
"As Keys tells it, he was merely gathering information as a journalist about Anonymous, but did not have his IRC handle registered—so, he supposes, someone else, using an entirely different IP address, was using that nickname instead."
"'That was one of several names that I used, but it wasn't locked down, it wasn't registered and it looks like somebody did use it. It was connected to an IP address that wasn't mine. The FBI agent admitted that he didn't have any records of [that IP address].'"
http://arstechnica.com/tech-policy/2015/10/journalist-linked...