Formal charges have been filed against four men after a police chase that started in Trussville ended with a crash involving a school bus in Birmingham. Those charged are:Jakorian Allen, 21, of Birmingham, converting a pistol to a machine gun, attempting to elude, unlawful possession of marijuana, and reckless endangerment. Brian McNair, 20, of Birmingham, converting a pistol to a machine gun, attempting to elude, unlawful possession of marijuana, and possession of drug paraphernalia. Jabari Pierce, 22, of Birmingham, converting a pistol to a machine gun, attempting to elude, unlawful possession of marijuana and second-degree receiving stolen property. Olijah Wright, 21, of Pinson, converting a pistol to a machine gun, attempting to elude, and unlawful possession of marijuana.