has been briefed on this shooting rampage? >> reporter: that's right, wolf, the president just returned to the white house in the last couple moments. he did not make any comments when he returned from his trip from oklahoma but our producer said the president had a grim expression on his face as he returned back into the white house. i should tell you wolf the white house has been very tight-lipped about this case. aides will only say the president has been briefed, his's getting constant updates from officials. earlier in the day you've heard questions about what the local authorities believe may be behind there. there was some talk it may be related to domestic terrorism. the fbi officials who was there during that news conference seemed to back away from that. i asked officials what about that? can you sort that out? they're just not doing that at this point. you've seen this as well we've