An online account purportedly linked to Thomas Matthew Crooks, the would-be assassin of former President Donald Trump, has been confirmed as fake, according to sources familiar with the investigation. An online post referred to the attack date as “premiere,” according to a law enforcement official and a source familiar with a briefing given to U.S. lawmakers, but it has since been debunked. The information was shared with multiple media outlets on Wednesday. However, a thorough investigation by federal authorities, including the FBI and Department of Homeland Security, has determined that the …