(at around 22 mins) McGarrett drives into Nick Vachon's driveway. The For Sale sign shows a six digit, rather than seven digit telephone number.
It's remarkable, with all the resources and talent available to Five-O, and with the stakes set so high, that all the effort put into the investigation after the trial wasn't done prior to the trial. Even with public fervor for a speedy trial, the DA's office would not have subjected a highly respected and decorated officer to such an ordeal without an extensive investigation.