bizarre. we have no reason that we can give you as to why he did this. >> but we think we know why. a victim's friend say gelman was a love sick psycho obsessed with a woman who rejected him. >> he was obsessed with her. he wanted to be with her but she did not want anything to do with him. >> he was stalking your girlfriend? >> a stunning 20-year-old had a date with the alleged killer who bragged about his love despite the beauty's disinterest. >> she told me she had changed her number in the past and he stopped bothering her a year ago. >> her devastated boyfriend. >> he wanted to be with her but she never would let him. he was upset co about that. >> she told him multiple times she didn't want to be around him? >> multiple times. >> the brooklyn mad man refused to let go.