The federal government is a great resource for research and statistical reports relating to criminal and social justice, plus public safety, and students in this field should make use of these resources.
USA.gov provides a Google-like search to find the government documents on your research subject.
National Institute of Justice is the research, development, and evaluation agency of the U.S. Department of Justice. Criminal and social justice students will find highly useful research reports from this agency for their own research papers.
The National Criminal Justice Reference Service (NCJRS) is a federally funded resource that is a great one-stop-shop site for any topic releated to criminal and social justice, the law, and public safety. Check the A-Z Topics list on the left hand side of the page.
The BJS, the primary source for criminal justice statistics, collects, analyzes, publishes, and disseminates information on crime, criminal offenders, victims of crime, and the operation of justice systems at all levels of government. This should be the first place criminal and social justice students should come for statistical data for their research papers.
The NIC is a center of learning that shapes and advances effective correctional practice and public policy. Its research reports is a highly useful resource for criminal and social justice students.