it was almost 25 years ago to the day that katie zimmer a mother of two was found slain in her car. >> reporter: zimmer was found stabbed to death. her body was found in her car parked in the san jose airplane. she was covereded in the this quilt. a quilt that prosecutors hoped would break the case. >> reporter: the passage of time actually helped solve the case. according to court documents we obtained today, dna found on an intimate part of zimmer's party was tested two years ago. that dna belonged to her brother-in-law, robert zimmer. >> the forensic science technology we have today did not exist 10 years ago let alone 1989. >> reporter: the physical evidence was a motive in the case. money the other. >> the financial gain was realized shortly after katie zimmer's death. >> reporter: under 125 years of freedom it's possible they thought they had gotten away with murder. but tonight they're both behind bars and the das office is determined to keep them there. patti lee, ktvu channel 2 news. >>> benetia police are looking to find an at risk woman who went missing this morning. she is