John,
You are right about the 22 murdered Union soldiers, they were on leave, mostly from Atlanta and at least one from New Orleans. They were from the 1st Iowa Cav, 1st MO Engineers and at least one from the 23rd Iowa. I have a total of 17 names so far. Most of the soldiers bodies were recovered by family, but 79 from the massacre and the battle were buried at Jefferson City Nat'l Cem.
E. D.