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Federal law enforcement officials, even in free states, were required to arrest fugitive slaves and anyone who assisted them and threatened with punishment if they failed to enforce the measure: “Any marshal or deputy marshal refuse to receive such warrant, or other process, when tendered, or to use all proper means diligently to execute the same, he shall, on conviction thereof, be fined in the sum of one thousand dollars.”41 The act nullified state laws and forced citizens and local officials to apprehend escaped slaves regardless of their convictions, religious views, or state or local laws and compelled citizens in free states to “aid and assist in the prompt and efficient execution of this law, whenever their services may be required.”42 Penalties were harsh and the financial incentives for compliance attractive. “Anyone caught providing food and shelter to an escaped slave, assuming northern whites could discern who was a runaway, would be subject to a fine of one thousand dollars and six months in prison. The law also suspended habeas corpus and the right to trial by jury for captured blacks.
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