Ooh, so close: 1954 in Kentucky. Although intentional releases of coyotes have happened numerous times in the southern US (apparently by fox hunters of all people), these releases appear to have been negligible in the persistent eastern range expansion of coyotes that has been well documented for at least the past 100 years.
It is also possible that the expansion of coyotes in the South has come from two directions: the range expansion across the Great Lakes states and into New England happened more rapidly, with New York's first coyote confirmed by 1925. Kentucky could've taken on coyotes from either the west or the north. The latest geopolitical area to now host coyotes? Newfoundland, colonized in the 1990s.
Of course, coyotes were well distributed in eastern North America during the Pleistocene, with fossils from Maryland, Pennsylvania, and New Brunswick. What we're seeing now is more a re-colonization than a range expansion.
Anywho, isn't it great to actually invest a few minutes to see what the data might say about a particular topic?
I can recommend The Wildlife Conservation Society's "The Ecology of Northeast Coyotes" (2002) by Matt Gompper. A pretty good source specific to Kentucky is Cox et al. (2001): The taxonomic status of wild Canis in Kentucky. Proc. Annu. Conf. SEAFWA. In the latter source, the authors used 143 known canid skulls to classify 56 unknown skulls. No wolf skulls in the lot . . .