He joined November 2013, so it’s his, not created after the fact. He’s 28 years old, so the ’87’ in the account name matches his birth year.
He was following 11 accounts and was only followed by one when I found the account, the Muslim American Society, who he also followed.
The one person he follows, @SafeensS, appears to be an Islamic apologist, alternately tweeting out things suggesting the shooting was a ‘false flag’, tweeting about ‘Islamophobia’ and making anti-Semitic tweets. He also retweeted some CAIR member tweets.
So has anyone asked CAIR if they knew Farook, since he was following CAIR?