What are the three most popular sources that measures crime in the U.S.?

What are the three most popular sources that measures crime in the U.S.?
Briefly discuss which one of the sources discussed above, you believe is the most accurate and why?
Based on official measures of crime, is violent crime more prevalent in the U.S. today than it has ever been at any given time in the country? briefly explain (cite your resource(s) ).
Would your answer be different depending on whether it is a violent crime vs. non-violent crime?
AVAILABLE SOURCES:Bureau of Justice Statisticshttps://bjs.gov
National Institute of Justicehttps://nij.ojp.gov/topics/articles/crimestat-spatial-statistics-program-analysis-crime-incident-locations
Department of Justicehttps://www.justice.gov