. >> reporter: defense attorney john edmunds doesn't normally find new cases in prison, but somethingmed very credible about this particular client referral. >> he turned to me and he said, you know, "my cell mate, who's out in the rec yard right now, doesn't belong here. there's something really odd about his case. would you look at it and see what you think?" >> reporter: so edmunds agreed to at least have a look at the record. a thick file of transcripts, hundreds of pages. and late one night, he was sitting up in bed beside his wife, reading every word said at ken's trial. and suddenly, there it was. eureka. >> and i get to the final argument. and the prosecutor makes a direct comment upon mr. wakisaka's failure to take the witness stand. >> reporter: this is what edmunds read. it's in prosecutor dan oyasato's final argument, his own words, "who was alone with her? he was alone with her. he was there. he would know. if he doesn't tell us, we can only look to shirlene and see what her body tells us." >> the fifth amendment privilege against self-incrimination is a constitutional ri