The law enforcement agency conducting the rape investigation can send the rape kit, in whole or in part, to the forensic science crime lab for analysis. Forensic scientists will try to develop a DNA profile of the assailant using the samples collected in the rape kit. If successful, the crime lab will search the DNA profile against DNA profiles of convicted offenders and other crime scenes using a DNA database. For example, crime labs in the United States run DNA profiles through the three-tiered Combined DNA Index System (CODIS), which was developed in 1990 and contains DNA profiles at the national, state, and local level. Similarly, the need to solve sexual assault crimes in Brazil led the Forensic DNA Research Institute of Federal District Civil Police to create a DNA database in 1998 containing evidence specifically collected in sexual assault cases. DNA matches in such databases not only aid in identifying the assailant where unknown to the victim, but also may help determine whether the assailant (known or unknown to the victim) is a serial rapist. These findings eventually may be made available for use in court.