In 2017, the number of homicides fell to 653, dropping to 561 in 2018 and 492 in 2019. Chicago's deadliest day since reliable digital records began in 1991 occurred on May 31, 2020, with 18 murders committed. This day was part of a three-day weekend that saw 85 shootings in the city. Reports indicate that the victims were of various ages and occupations, but mostly black. The violence was framed by the George Floyd protests, but researchers said it was unheard of and unable to be contextualized. The city's second-deadliest day saw 13 murders, and occurred in 1991 shortly after digital records were introduced; there is no deadlier day recorded in the past 60 years, but records prior to 1991 may be unreliable.