. >> reporter: mary berwert lived here in walnut creek in 1979. she was 13 years old and was assaulted in her bedroom by the golden state kill remember also known as the east area rapist. her case, though, is not one of those being prosecuted. >> at first it was really updati upsetting to me that he wouldn't stand accused of the crime against me. but it's so small in comparison to how many people are affected. >> reporter: mary berwert watched the press conference from her east bay apartment. se said she would testify if called to the stand, but otherwise will avoid the trial in sacramento. >> horrible stuff has happened to these people. and i don't want to have any details on that. i don't want to know the fine details. i just want him to get the quickest route to prison as possible. >> the contra costa county district attorney's office is able to charge four separate cases against joseph deangelo for the crimes in our county. >> reporter: three of the four assaults took place in concord and san ramon in october 1978. the fourth took place in dan