NEW : Defense Secretary Gates : Leaks should stop , because they might jeopardize probe . Medical school classmates : Hasan espoused Muslims views in class . He was `` put in the fellowship program because they did n't know what to do with him . '' the Defense Department 's said his allegiance was to `` Sharia law , law , not the U.S. , source says . Hasan charged with murder , accused of killing one at Fort Hood last week 's .
NEW : Defense Secretary Gates : Leaks should stop , because they might jeopardize probe . Medical school classmates : Hasan espoused Muslims views in class . the Defense Department 's said his allegiance was to `` Sharia law , law , not the U.S. , source says . Hasan charged with murder , accused of killing one at Fort Hood last week 's .