Additionally, the probation officer must make an inquiry into the offender's criminal history. This is usually accomplished by using databases maintained by the Federal Bureau of Investigation (FBI), the National Crime Information Center (NCIC), or state law enforcement agencies. Though the guideline criminal history category is based only upon sentences imposed for juvenile adjudications and criminal convictions meeting specific criteria, the probation officer reports all known incidents in which the defendant has been involved in criminal behavior to partially fulfill the statutory mandate to provide information to the court regarding the history and characteristics of the defendant. The early examination of computerized criminal history records enables the officer to identify which law enforcement, court, and correctional records must be reviewed. In addition, the initial interview of the defendant should include questioning about the offender's residential history so that the officer can check local police and court records in every jurisdiction where the defendant has lived. Additionally, the probation officer may request physical and mental health, educational, employment or financial records from a variety of sources to corroborate information provided by the offender.