As I noted in the introduction to my book, The Obama Timeline, a jury at a murder trial will often find the accumulated circumstantial evidence so overwhelming that a guilty verdict is obvious—even though there may be no witness to the crime. “The jurors in the Scott Peterson trial believed the collection of evidence more than they believed Scott Peterson. Among other things, the jury thought that being arrested with $15,000 in cash, recently-dyed hair, a newly-grown goatee, four cell phones, camping equipment, a map to a new girlfriend’s house, a gun, and his brother’s driver’s license certainly did not...