but relief, too, it wasn't michelle. so the search and the mystery wore on for days-- and then, for weeks. and by the middle of august, it all looked to be losing steam. on a typical san francisco summer afternoon as the fog rolled in, krystine and michael brought us up-to-date on their efforts to find michelle. how long has it been now? 27-- it's been over two months. it's been about 72 days. how are you doing, the two of you, with all this? i mean, how are you holding up? it's just weird-- just trying to stay active and just trying to keep the word out. and trying to stay positive. right. it's just really-- trying to stay positive is the hardest part. krystine dinh: the hardest times for me are at night-- getting in bed and thinking, gosh, i wish michelle is in a-- i hope michelle is in bed. yeah. i mean, you clearly have decided she's still alive. it's not over. and it's not going to be over until we get her home. keith morrison: and so, that very evening,