Violence among children has soared across the country since 2020, a stark reversal of a decades long decline in juvenile crime. In the U.S., homicides committed by juveniles acting alone rose 30% in 2020 from a year earlier, while those committed by multiple juveniles increased 66%. The number of killings committed by children under 14 was the highest in two decades, according to the most recent federal data. One consequence is a mounting toll of young victims. The number of juveniles killing other juveniles was the highest it has been in more than two decades, the 2020 federal data show. In New York City, police said 124 juveniles committed shootings during 2022, up from 62 in 2020 and 48 in 2019. "The tragedy here is that we're talking about a gunman who is too young to be called a gunman because he's 15 years old," said Bronx District Attorney Darcel D. Clark after Kyhara's death. "These ages make you weep." The jump comes amid an overall wave of violent crime in the first two years of the pandemic"particularly homicides and shootings"that swept through urban and rural areas alike. Police, prosecutors and community groups attribute much of the youth violence to broad disruptions that started with the pandemic and lockdowns. Schools shut down, depriving students of structure in daily life, as did services for troubled children. Increased stress compounded a swelling mental-health crisis. Social-media conflicts increasingly turned deadly.