detectives circled back to the secret boyfriend, jeff kane. with sandi's death. jeff kane was cleared. >> as for husband greg who had done so many things that raised suspicion early on, ultimately he had an alibi that checked out. he'd clocked in and out of his job at boeing the day sandi went missing. colleagues had seen him there, and after work, he was with friends who vouched for him. finally, greg johnson was off the list. >> how well do you remember that moment, where the police came to see you and said, you're not a suspect anymore. >> i remember it very well. it was a relief. it was a good day for me. it really was. that left sandi's friend from work, cliff reed, cold case detective jim allen now retired decided to see if he could find some physical evidence tying cliff reed to the death of sandi johnson. it turned out the passage of time in the case gave police new tools. >> forensics had changed over the years, so there was the potential of testing a lot of things that had not -- wouldn't have been able to be tested back then for dna