I rather doubt if the black POW was at Camp Chase. In March of 1862 approximately 75 blacks entered Camp Chase and the majority had been taken at Fort Donelson. A few were also taken to Camp Douglas. The folks in Columbus, Ohio were in an uproar and newspaper articles appeared asking if slavery was legal in Ohio. Governor Tod even went to Washington, DC to visit Lincoln. Governor Tod released the blacks in small groups every few days until all were gone. The junior officers were sent to Johnson's Island in April and by mid April no blacks were held at Camp Chase. Governor Tod was the Governor until January 11, 1864. I've never run across another black POW at Camp Chase after the blacks were released from Chase in the Spring of 1862.
While I did see where McDermott was a slave serving I did not see where he was imprisoned on the Federal POW Records at ancestry.
Twelve junior officers were taken at Arkansas Post and died at Camp Chase There was 1 3rd lieutenant 6 2nd lieutenants 3 1st lieutenants and 2 captains.