Thomas Waterman Killed in Civil War.

I ran across this report will looking for something else and found it interesting. If any one knows the story behind this event I would like to hear about.
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GENERAL ORDERS,
HDQRS. DEPARTMENT OF THE MISSOURI, Numbers 159.
Saint Louis, Mo., September 1, 1864.

The general commanding, satisfied that the citizens of the town of Rocheport, in Boone County, Mo., have countenanced, tolerated, and fed, if not encouraged, gangs of bushwhackers and other outlaws, for the last six weeks, and being apprised that a gang of these villains in open daylight shot and murdered Thomas Waterman, the only support of a widowed mother and two sisters, on the steam-boat Buffington, at the landing of said town, orders that the sum of $10,000 be collected from the disloyal citizens of Rocheport and paid to the chief quartermaster of the department for the use of the widow and sisters of said Waterman. The district commander is charged with the execution of this order.

By command of Major-General Rosecrans:

O. D. GREENE,

Assistant Adjutant-General and Chief of Staff.