On Saturday they celebrated outside the West County Detention Facility in Richmond, Calif.
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Mexican national Hugo Aguilar had been held there for 17 months until Thursday, when advocates paid an $80,000 bond.
Most of the undocumented immigrants being detained at the facility were transferred elsewhere after the Sheriff's Office terminated its contract with ICE.
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Aguilar wants to see all of them freed.
"I wish everybody in there could be with their family, too. And all of the people who got moved to other states, I hope they let them out," Aguilar said.
Aguilar was arrested last year and said ICE officers detained him.