The phrase "alleged gunman" means that there is a person who is claimed or accused of being the shooter, but it has not been proven or confirmed yet. Full definition
Stack said he was surprised that the 19 - year - old alleged gunman had purchased a shotgun at a Dick's store last year, although that gun was not the weapon used in the school shooting. (washingtonpost.com)
After pictures of the alleged gunman posing with a Confederate flag surfaced in news coverage, retailers started dropping it from their stores and websites. (fortune.com)
NBC 6's Dan Krauth discusses reports detailing the behavior behind bars of the alleged gunman in the Parkland school tragedy. (nbcmiami.com)