He looks down that hallway, and this is what he sees? Doors. He doesn't know whose door is what. He's never been in there! Good guess. Their theory. Their theory requires you to believe beyond a reasonable doubt that this is what happened.
Mr. Dusek said yesterday that he can't tell you what happened...he's just guessing. But somehow, on Dusek's theory, David Westerfield, all 6'2" of him, sneaks in to the door that Brenda testified she closed when she put the kids to bed. No sound. So he sneaks in. Must be really, really careful not to leave any fingerprints.
So he sneaks into the bedroom, then -- Whoops! In comes Brenda. And in comes Rich and Keith and Denise...so he closes the door. Brenda and the girls go up to the master bedroom.