practice. >> back in the '80s, i worked in maimonides medical center in brooklyn, where i met bob bierenbaumcially awkward. he was socially awkward with the patients as well. he did not have a connection with his patients. i think he was very into himself, and i don't think he was really interested in his appearance all that much. he would have his pants halfway down in the back, very wrinkled shirt on. >> gail was an undergraduate finishing her b.a., taking classes at hunter college. money was tight, and gail decided that one way to make it was to try to be a personal assistant to women living on the upper east side. and so she put out an ad. >> i responded and in no time, she was working for us. >> francesca beale was a high powered attorney at cbs tv at the time, and she puts gail to work as her assistant. >> she was beautiful. she was delightful. everyone who met her said how wonderful she was. and she glowed with happiness at that point. >> did she ever talk much about her husband at that point? >> no much, but when she did it was in terms that i would say were affectionate and that she

bob. there's no other suspect. >> on monday july 8th, 1985 about 9:00 in the evening robert bierenbaum came into the precinct to report his wife, gail, missing. >> reporter: bob tells police that they had an argument, then she came here to the park? >> yes. and by the very following weekend we had missing posters made of gail. >> it was almost like pulling teeth to get robert bierenbaum to help. >> reporter: authorities continued to search tore gail and ultimately determined she did not die by suicide in the park. ♪ weeks after his wife's disappearance bierenbaum is seen partying in the hamptons. he's even started dating. >> even his dress changed from ll bean to saturday night fever. this wasn't the concerned husband. >> reporter: gail's family gets their hopes up about holding bob accountable when investigators make a shocking discovery at a new jersey air field. >> robert bierenbaum, the day his wife disappeared, drove to cole airport sometime in the afternoon. flew a plane for over an hour and a half. returned to the airport and then went to his sister's house for the party. the working

bierenbaum finally admits to killing gail. >> the earth shifted. i was in shock. >> tonight on "20/20" much more from the murder victim's sister and never before heard shocking details from bob'sd over to you. >> yes, and we have three confirmed tornadoes by wtae reporting that this morning, certainly damage around the pittsburgh area, thanks to a cold front that for the rest of us is just bringing a return to autumn. the temperatures will dip into the 40s again for new york and boston. raleigh, even, by sunday morning. sub 50. now i have to tell you that noaa put out their official winter outlook, and there's a strong signal of la nina. with that we anticipate warmer than average temperatures and less precipitation in places that really need it. >>> now to our series "gma" supply solutions, it's all about helping you get through the holiday season. we're doing a special halloween edition this morning with etsy trend expert dana johnson and "gma" fashion expert melissa garcia. thank you both for joining us. dana, i want to start with you. how can etsy -- how can a site like etsy help beat the supply chain strain that we're seeing all around the country right now? >> yes, so, t