Whenever you hear the sky rumble, that usually means a storm. In Virgil Flowers' case, make that two.

The first comes from, of all places, the Minnesota zoo. Two large Siberian tigers have vanished from their cage, and authorities are very concerned that they've been stolen for their organs. Traditional Chinese medicine prizes their parts for home remedies, and people will do extreme things to get--and keep--what they need. As Detective Flowers of the Minnesota...