For exactly a year during the pandemic, the United States did not see a single high-profile public mass shooting. But a surge in daily gun violence contributed to an estimated 4,000 additional murders throughout 2020, in what experts warn will probably be the worst single-year increase in murders on record. There were only two public shootings in 2020 that primarily targeted strangers, were not related to other crimes and killed at least four victims one standard definition researchers use to classify "mass shootings" " according to two databases that track this kind of gun violence. That's the lowest annual count of high-profile mass shootings in America in nearly a quarter-century, according to Jillian Peterson, the founder of the Violence Project. At the same time, the number of people murdered in everyday violence last year surged in cities large and small. Early estimates suggest the US may have seen at least 4,000 more murders last year than in 2019, and potentially as many as 5,000 more, according to projections based on FBI data, though complete official statistics will not be available until the fall. The number of all murders rose 25% across the country in 2020, with double-digit increases in small, medium and large cities, according to preliminary data from a large subset of law enforcement agencies that the FBI released last week. That would be the highest single-year increase, both in the murder rate and in the total number of additional murders, going back to 1960, the earliest year national crime data is available.