investigators say shannon griffin was in marriage counseling with her husband roscoe when he told her divorce ask he would not give up his mistress. police say shannon griffin, who used to work at nasa, then drove 250 miles, you see the map, all the way to the missouri home of the mistress, shooting her two times from four feet away. they say the mistress' mother witnessed the attack. sunny hostin always on the case with us. sunny, she has been charged with premeditated murder. does the defense have any standing when they say the defendant drove 250 miles to her home? >> she's facing premeditated murder, and they sometimes say she's insane, but the law says you have to do it immediately, you can't have any in flexiflex. four hours in a car gives one plenty of time to think about something, right, brooke? i would say this insanity plea isn't going to be viable for her, it's not really going to be viable. perhaps an insanity defense, but temporary insanity? i don't think so. >> she shot the mistress. do you think the husband can testify against the wife? does husband/wife privilege come

griffin, fox news. >> bret: the supreme court today heard arguments in a case involving labor, big labor, big money and politics. correspondent shannons. >> the workers deserve right to say no. all workers do. >> reporter: in california, state workers have two options. join the service employees international union and pay dues or elect not to join the union and still be obligated to pay nonmember dues. either way, the union is required by law to give a full accounting and note to nonmembers if it decides to use their dues money for political purposes. so they have the option to object. a number of nonmembers say that didn't happen when seiu levied a midyear special assess in the 2005, which was used to directly fund several political initiatives to which many state workers have repeatedly objected. >> i file a letter every year with the seiu. and i object to any fees that are not germane to collective bargaining; specifically, the political action fund. >> reporter: the legal battle has been raging for years. the union eventually gave the nonmembers a chance to object and paid some of them refunds. in fact, nonmembers can object on