The cancerousness of the link aside, that's just not true at all, modern policing is based on the Slave Patrol of yore in America, as well as around the islands and Nations in Latin America, in the earlier days, and they most certainly used dogs to hunt down slaves, and they most certainly use dogs to kill slaves. They called them Slave Hounds.

This article draws upon archival research and the published materials of former slaves, novelists, slave owners, abolitionists, Atlantic travelers, and police reports to link the systems of slave hunting in Cuba, Jamaica, Haiti, and the US South throughout the eighteenth and nineteenth centuries. Slave hounds were skillfully honed biopower predicated upon scenting, hearing, sighting, outrunning, outlasting, signaling, attacking, and sometimes terminating, black runaways. These animals permeated slave societies throughout the Americas and bolstered European ambitions for colonial expansion, indigenous extirpation, economic extraction, and social domination in slave societies.

Y'all are disappointing.