In the last 5 years, a number of European countries have successfully intro
duced national databases holding the DNA profiles form suspected and convic
ted criminal offenders as well as from biological stain materials from unso
lved crime cases. At present, DNA databases art: fully or partially in oper
ation in the UK, The Netherlands. Austria, Germany, Finland, Norway, Denmar
k. Switzerland and Sweden. Furthermore, in the other European countries. sp
ecific legislation will be enacted soon, or the introduction of such databa
ses is bring discussed to initiate a legislative process. Numerous differen
ces exist regarding the criteria for a criminal offender to be included in
the database. the storage periods and the possibility to remove database re
cords, the possibility to keep reference samples from thr offenders as long
as their respective records are bring held, and the role of judges in the
process of entering a database record or to perform a database search. Neve
rtheless, harmonization has been achieved regarding the DNA information sto
red in national databases, and a European standard set of genetic systems h
as been recommended which is included either in part or completely in the D
NA profiles of offenders and crime stains for all European databases. This
facilitates the exchange of information from database records to allow the
investigation af crime cases across national borders. (C) 2001 Elsevier Sci
ence Ireland Ltd. All rights reserved.