What was the fugitive slave act what were the results of this act?

Reinforced "by law" the right to seize and return to bondage slaves who had fled to free territory. Some of these were already freed African Americans who were then sold into slavery.

Because Freeded isn't a word
"The Bloodhound Bill" fleeing slaves couldn't testify for own behalf, denied a jury/trial, and the northerners must return fugitive slaves to their owners to possible harsher treatment such as having their (the slaves') foot cut off. If northerners did not comply, they were sentenced to slave catching.