A mass shooting is a violent crime in which one or more attackers kill or injure multiple individuals simultaneously using a firearm. Mass shootings have been documented using a variety of methods, including body cameras and closed-circuit television cameras (CCTV). Filmed mass shootings have been controversial due to their content, availability, and ability to quickly spread across social media platforms. In response to this, several governments have outlawed the distribution of filmed mass shootings, including the government of New Zealand after the Christchurch mosque shootings. Livestreaming has been a way for mass shooters to gain public attention, and several mass shootings have been livestreamed, either through webcams or body-worn cameras. Livestreaming has also been shown to inspire copycats.