in the cnn documentary losing lennon, we hear from people who were there. cnn s john roberts talked with a woman who had a pretty eerie conversation with chapman days before his infamous crime. it had to be done. nothing could have stopped me. on december 6th, chapman arrived in new york city. he checked into the ymca just blocks from lennon s home. almost immediately he began stalking his victim and headed over to the dakotas. he was very quiet, dressed casually, dressed very normally. jeri mall and her friend jude stein were there when chapman arrived. and then he said he was there to see john and it was always his dream to meet john. reporter: but lennon never came out of the building. mall and stein swewent across t