A Corrections Officer has made the following notes for the warden of his institution about an incident involving an infraction of the rules: “March 29, 2009. Cell block B-4. Inmates involved were: Whitman, T. Brach, M. Purlin, M. Verey. Whitman and Brach started the trouble about 7:30. I called for assistance. Officer Haley and Officer Blair responded. Officer Blair got cut, and blood started running down his face. The bleeding looked very bad. He was taken to the hospital and needed 8 stitches.” Which of the following items of information is missing or is incomplete in these notes?