Overview

The Fugitive Slave Acts were a pair of federal laws that allowed for the capture and return of runaway enslaved people within the territory of the United States. Enacted by Congress in 1793, the first Fugitive Slave Act authorized local governments to seize and return escapees to their owners and imposed penalties on anyone who aided in their flight. Widespread resistance to the 1793 law led to the passage of the Fugitive Slave Act of 1850, which added more provisions regarding runaways and levied even harsher punishments for interfering in their capture. The Fugitive Slave Acts were among the most controversial laws of the early 19th century.

Statutes regarding refugee slaves existed in America as early as 1643 and the New England Confederation, and slave laws were later enacted in several of the 13 original colonies.

Among others, New York passed a 1705 measure designed to prevent runaways from fleeing to Canada, and Virginia and Maryland drafted laws offering bounties for the capture and return of escaped enslaved people.

By the time of the Constitutional Convention in 1787, many Northern states including Vermont, New Hampshire, Rhode Island, Massachusetts and Connecticut had abolished slavery.

Concerned that these new free states would become safe havens for runaways, Southern politicians saw that the Constitution included a “Fugitive Slave Clause.” This stipulation (Article 4, Section 2, Clause 3) stated that, “no person held to service or labor” would be released from bondage in the event they escaped to a free state.

 

History.com

https://www.history.com/articles/fugitive-slave-acts

"Fugitive Slave Clause" 

 

Constitution Article IV, Section II, Clause III

"No Person held to Service or Labour in one State, under the Laws thereof, escaping into another, shall, in Consequence of any Law or Regulation therein, be discharged from such Service or Labour, but shall be delivered up on Claim of the Party to whom such Service or Labour may be due."