Criminal Justice Databases (in alphabetical order, and accessed by one of the 3 choices below)
Google Scholar : (Google > More [top bar, right] > Google Scholar) : A freely accessible Web search engine that indexes the full text of scholarly literature across an array of publishing formats and disciplines. Google Scholar index includes most peer-reviewed online journals of Europe and America's largest scholarly publishers. It is similar in function to the freely available Scirus from Elsevier, CiteSeerX, and getCITED. Because most of Google Scholar's search results link directly to commercial journal articles, a majority of the time users will only be able to access a brief summary of the articles topics, as well as small amounts of important information regarding the article, and possibly have to pay a fee to access the entire article. Google Scholar is as easy to use as with the regular Google web search, especially with the helpfulness of the "advanced search" option, which can automatically narrow search results to a specific journal or article. The most relevant results for the searched keywords will be listed first, in order of the author's ranking, the number of references that are linked to it and their relevance to other scholarly literature, and the ranking of the publication that the journal appears in. Through its "cited by" feature, Google Scholar provides access to abstracts of articles that have cited the article being viewed.
Google Scholar’s legal database of US cases is extensive. Users can search and read published opinions of US state appellate and supreme court cases since 1950, US federal district, appellate, tax and bankruptcy courts since 1923 and US Supreme Court cases since 1791. Google Scholar embeds clickable citation links within the case and the How Cited tab allows lawyers to research prior case law and the subsequent citations to the court decision. The Google Scholar Legal Content Star Paginator extension inserts Westlaw and LexisNexis style page numbers in line with the text of the case.
--from Wikipedia