There is no record of Mr. Kennedy being a US Marshal anywhere in the U.S. It's possible he was a deputy US marshal but certainly would not have been the first in northwestern TN or eastern MO. The District of Tennessee was created on 1/31/1797 and in the early 1800's was spit into the Western, Eastern and Middle districts. In MO the district of the Territory of Missouri was created on 3/3/1805 and later in the 1800's divided into the eastern and western districts. Your Mr. Kennedy, if he was a deputy US marshal would not have been the first and if attached to TN probably wouldn't have been sent into MO since they had their own deputies.