Florida shooting: FBI and teachers warned about Nikolas Cruz The FBI has launched a review of its handling of a warning about the teenager accused of carrying out Wednesday's school shooting in Florida. Nikolas Cruz, 19, has appeared in court charged with premeditated murder. With 17 people killed, this is the deadliest US school shooting since 2012. Mr Cruz reportedly commented on a YouTube post last year that he would be a "professional school shooter". The FBI admitted that a user had alerted authorities to the post but they were unable to fully identify the person who posted it. Expressing his condolences earlier, President Donald Trump said he is "making plans to visit" Parkland. Meanwhile a night vigil has been held for victims of the shooting incident. SOURCE: BBC NEWS ---DECRYPTED---