All happy families are alike, wrote Tolstoy, but unhappy ones are unhappy in their own way. Perhaps none was unhappier last Thursday than the family of Eileen Franklin-Lipsker, who took the stand in municipal court in Redwood City, Calif., to accuse her father, George Franklin Sr., of sexually molesting and then beating to death her best friend, Susan Nason, in her presence more than 20 years ago.
When Franklin-Lipsker, now 29, first made that stunning disclosure last November, it broke open a case that local authorities thought they would never solve. Her story was credible enough for police to arrest Franklin,...