Critical MassBy: Steve Martini Joss Cole, a burned out public defender from LA, has opted for a quieter life in Washington State. Then into her office walks Dean Belden in search of a lawyer to help him set up a business. Within days Belden appears before a federal grand jury and, just minutes before testifying, he is killed. Meanwhile, Gideon van Ry, a nuclear fission expert in California, is troubled by the failure to account for two nuclear devices missing from