A close look at Philadelphia's 499 homicides in 2020 reveals that the surge in violence began after the city's COVID-19 lockdowns were put in place and continued throughout the rest of the year. As Cam explains, the data demonstrates that the shootings and homicides weren't driven by the increase in gun sales to law-abiding citizens, but by the pullback on the part of police and the court system, which led to far fewer consequences for violent offenders.