Why mass shootings and violence increase in the summer

Violence and mass shootings often surge in the summer months. That’s especially true around the Fourth of July. It's usually one of the deadliest days of the year. The Gun Violence Archive tracks mass shootings and shows June, July, and August have had the highest total number over the past decade. Independence Day tops the list with 58 mass shootings over the last 10 years. Researchers point to a combination of factors that have caused the summer months to see an increase historically in violence and shootings. They say the reasons include more social events, teens out of school and hotter temperatures.