https://www.answers.com/history-ec/Which_law_required_citizens_to_help_catch_runaway_slaves
Which law required citizens to help catch runaway slaves? - Answers
The Fugitive Slave Act.
runaway slaveslawrequiredcitizenshelp
https://www.answers.com/us-history/What_is_the_name_of_a_person_who_caught_runaway_slaves_and_returned_them_to_their_owners
What is the name of a person who caught runaway slaves and returned them to their owners? - Answers
A person whose business was catching escaped slaves to return them to their owners was called a "slave catcher."
https://wherevertheresafight.com/
Wherever There's A Fight: How Runaway Slaves, Suffragists, Immigrants, Strikers, and Poets Shaped...
Award-winning book documenting civil liberties struggles in California