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Police said there could be additional victims, WTTG reported.
The center helps people with disabilities find jobs or get training. It also provides other social services.
Center officials said Betts-King has been fired, the Post reported.
Police said he also worked at Community Living Alternatives, WTTG reported.
Both MVLE Community Center and Community Living Alternatives are working with police for the investigation, WTOP reported.
Betts-King is in the custody of an adult detention center, WTOP reported.