National Criminal Justice Reference Service - http://www.ncjrs.org/ This is the Web site of the National Criminal Justice Library, located in Rockville. The site contains a great deal of full text information, as well as the address and phone number of the library itself.
NCJRS Abstracts Database - http://abstractsdb.ncjrs.org/content/AbstractsDB_Search.asp
A seachable index to over 185,000 abstracts from National Criminal Justice Reference Service documents. 7,000 full text documents can also be searched from the NCJRS Virtual Library . Make sure to complement your research with the library's Criminal Justice Periodical Index if you are looking for articles.
Criminal Justice Corner 2.0 - http://users.aol.com/crimejust/cjc.html Good information about computer crime.
Forensic Science Communications - http://www.fbi.gov/hq/lab/fsc/current/descript.htm Online journal published by the FBI. Covers the scientific investigation of crime.
Bureau of Justice Statistics - http://www.ojp.usdoj.gov/bjs/ This site contains many useful statistics including information on criminal sentencing, drugs and crime, crime characteristics etc.
FBI Uniform Crime Reports - http://www.fbi.gov/ucr/ucr.htm The FBI collects and publishes crime statistics from all jurisdictions on this Web page.
Juvenile Justice Statistics - http://ojjdp.ncjrs.org/ojstatbb/index.html Thorough coverage of juvenile crime.
National Archive of Criminal Justice Data - http://www.icpsr.umich.edu/NACJD/ Gathers criminal justice statistics from all Federal agencies. Good for historical research.