Slavery, freedom, and kidnapping in the mid-Atlantic. This is the story of Thomas McCreary, a slave catcher from Cecil County, Maryland. Reviled by some, proclaimed a hero by others, he first drew public attention in the late 1840s for a career that peaked a few years after passage of the Fugitive Slave Act of 1850. Living and working as he did at the midpoint between Philadelphia, an important center for assisting fugitive slaves,...