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Geographic Information Systems

Department of Juvenile Services (DJS)

Among the vital services that Washington College provides is comparing offender data from multiple sources. Because we have data sharing agreements with so many different Maryland law enforcement agencies, we can produce comparison analysis and maps that no single law enforcement agency could produce alone. One example of this is the colocation analysis, which highlights offenders under supervision by multiple agencies.

How do you find matches between two completely different databases? There are two methods which Washington College uses: colocation analysis and dual supervision analysis. We perform these analyses bi-monthly on data from the Department of Juvenile Services (DJS), Maryland Community Services (MCS), the Maryland Sex Offender Registry (MDSOR), gang intelligence data received from the Maryland Coordination and Analysis Center (MCAC), and more. We perform multiple selections and queries on all these datasets to determine the number of juvenile offenders living with adult offenders, sex offenders, or known gang associates. The colocation analysis pulls out all addresses where offenders from multiple datasets are living. The dual supervision analysis pulls out individuals that appear in multiple datasets. Both analyses are compiled in Excel, mapped in ArcGIS, and then sent off to their respective agencies for further investigation.

Case workers in both DJS and MCS regularly use this analysis to follow up on cases identified as being either collocated or dual supervised. The analysis highlights individuals and addresses in need of greater attention from law enforcement due to higher risk. This information is also reported at StateStat meetings by both agencies. Performing this level of analysis on hundreds of thousands of records is very time consuming, but ultimately worthwhile to our clients in law enforcement. In addition to the bi-monthly analysis, we also track trends over time and provide additional maps on demand. Requests include mapping juveniles based on case type, as well as mapping juveniles with felonies and violent crimes. Mapping can be provided on a statewide level, as well as broken down into the specified regions. Other law enforcement agencies throughout the state often request data and mapping products that utilize the DJS data we receive.