6/2     Theories have swirled around Nina's disappearance. Did she embezzle
        money from Reiser's company and run back home to Russia? Was she
        involved with the KGB or the Russian mafia? Did Hans Reiser's cunning
        intelligence help him almost get away with murder?
        48 Hours Mystery correspondent Maureen Maher reports on the case this
        Tuesday, June 3, at a special time, 9 p.m. ET/PT.