Hannah Dugan, the Milwaukee County judge arrested Friday by the FBI for allegedly obstructing federal authorities who were seeking to detain an undocumented immigrant, was a longtime social justice advocate before she took the bench.

A crowd of more than 200 protesters gathered to oppose Milwaukee County Circuit Judge Hannah Dugan's arrest and felony charges.

Dugan previously worked for legal aid organizations and was once the Milwaukee Bar Association president. An alderman who knows her says she's the "model of public service."