when frank di gaetano, the prosecutor in seemona's rape case first heard about her arrest, he had tokind of person his star witness really was? >> i have prosecuted a priest. i have prosecuted doctors, lawyers, boy scout leaders, people that you wouldn't think would be engaging in criminal activity, but yet they were. >> when you hear robbery and seemona, what was your first thought? >> i couldn't believe it. i didn't think she was like that. >> did you think this must be some horrible mistake? >> well, i believe that, you know, there's four sides to the story. >> for science? >> if the truth may be, whatever -- >> and in the case of seemona and jerry, all sides who are about to collide, exposing how far some people will go to exact revenge. ♪ ♪ ♪ >> coming up -- seemona's rage. >> in the email it says, revenge is sweet. >> there is no doubt that i had that. i'm not gonna deny that. >> but does she have an alibi in the robbery case? when dateline continues. ♪ ♪ ♪ (husband) they'd take this mess? (caroler) ♪ very much so. just trade in that old phone. ♪ ♪ for a free 5g phone, plus net