Consider using CQ Researcher to start your search. This database provides in-depth, unbiased research reports on the most important issues of the day. Full-length articles include an overview, historical background, chronology, pro/con feature, plus resources for additional research.
Database for sociology, with solid coverage for social work, social psychology, addictions, and criminal justice issues. Full text for journals dating back as far as 1908, with selective text and abstracts for others going back as far as 1895, plus numerous books, conference papers, and other monographs.
"Drawing on exemplary studies, chapters in each section illustrate the techniques (qualitative and quantitative) that are commonly applied in empirical studies, as well as the logic of criminological inquiry."
"This Encyclopedia includes A to Z entries that explore the scope of ethical decision making and behaviors within the spheres of criminal justice systems, including policing, corrections, courts, forensic science, and policy analysis and research."