Dave,

No, I have never seen Major Torrence's 17 April 1862 report. Based on what you just said about your intensive search, it strikes me there is a possibility Torrence's final report no longer exists.
All is not lost however. Another descendant of the Burgess family, Joshua Ellis, directed me to Torrence's handwritten findings resulting from all the interviews he conducted as head of a board consisting of also Captain McQueen and Lieutenant Kerr in Warrensburg that April.

This is in the National Archives and Records Administration, United States, "Union Provost Marshal Files of Two or More Civilians, 1861-1866," Records by Number and Date 00821-01078, Mar.-Apr. 1862, pages 1012 through 1077 of 1211 different pages in that particular file.

You could find this online in FamilySearch.org for free, too, as I understand it.

Glad you asked, Bruce Nichols