(Video Clip of Waukesha Parade Attack Suspect "MathBoi Fly") "Waukesha Attack Suspect ID'd; Was Released on Bail Two Days Ago". Name: Darrell E. Brooks Jr., a career Criminal/Registered Sex Offender & Rapper who performs under the name "MathBoi Fly". NOTE: 6 people were killed and 61 injured -including 17 children. Brooks has been convicted on a number of criminal charges since 1999. He has several open felony charges filed against him on Nov 5, 2021. He was charged in Milwaukee courts for resisting an officer, felony bail jumping, second-degree recklessly endangering safety (felony) with domestic abuse assessments, disorderly conduct, and battery. On Nov 19, he posted a bail of $1000 in cash. Brooks also has another charge of second-degree reckless endangerment of safety, dating back to July 2020. At that time he was charged with two counts of use of dangerous weapon and a felony count of possession of a firearm.