There is a secret agency recruiting,, lonely and distubed young men..He talks them into a specail plan. or operation.to make them feel important.and part of something big and good. this agent is not includeing all the details.. he coaches them.. intimadates them.. then forces them to go on the mission with him.. the specail agent kills everyone.. and then kills the student he recruited and was made by force to go along with him... leaving nothing but the weapons. he escapes ..makeing it look like a suicide by a lonewofe. this explains wearing the mask part to.. and explains no video footage.. not a metion.. of cameras because ..it will show more than one shooter! and the real killer. a special shooter even military background type marksman-cia agent??? TheEnd..