jfblodi, I'm so sorry to learn of your loss.
By chance, was your wife's jewelery in your bedroom dresser drawer?
An alarm tech told me that's the first place they go -- even with an alarm. Bedroom dressers and closets are where everybody keeps their "easily carried, easily sold" money and jewelry. Thieves can be in and out with the most valuable stuff in a few minutes. A great (Hollywood) example is a scene in the movie L.I.E.