The first came back in September when they were alerted to comment made by YouTube user 'Nikolas Cruz' proclaiming his desire to be a 'professional school shooter.' 'The FBI conducted data reviews, checks, but was unable to further identify the person who actually made the comment.' He also said that he believes the FBI and YouTube handled the situation as best they possibly could at the time. 'So I don't know, I'm not here to judge, I'm just here to share my experience. On Instagram, Cruz could be seen holding firearms, ammunition and the semiautomatic AR-15 rifle he likely used in bthe attack.

Source: Daily Mail February 15, 2018 13:27 UTC