Dateline | November 09, 2012
>>> it had been five months since the stabbing death of anna - lisa raymundo in stamford, connecticut, and now --
>> i was in shock and i was holding it down.
>> police in nearby westchester county , new york, were engaged in a bizarre conversation with a woman whose husband had been stabbed. the wife was fuzzy about the details, but the husband told investigators he had been stabbed while the couple was playing some sort of game in their home.
>> you can blind fold each other, tie each other up and have to guess the object touching your body.
>> the husband will never forget it.
>> and what did this game involve?
>> it was described as a guessing game where a person would be handcuffed and blindfolded. you couldn't see and you would have to try to guess what the items were.
>> now, i'm not passing judgment here --
>> -- but when a game involves a blindfold and handcuffs.
>> you want to think it's got to be sexual.
>> you would think.
>> yeah. it's a good point. i wouldn't be afraid to say if it was sexual. but the truth is, it wasn't.
>> kind of an odd diversion for two academics. the wife, sheila davdavalloo, was a research scientist . her husband was pursuing his doctorate in epidemiology.
>> i was in school. she said she heard this game, she was bored, she wanted to play it. it would take a couple of hours.
>> paul said sheila went first. she was handcuffed to a chair. he put a few items against her face. a camera, a shampoo bottle. she tried to guess what they were. then it was paul 's turn. blindfolded, handcuffed, the whole drill.
>> how long did it take until this game took a very bizarre, painful and dangerous turn.
>> i'd say after about five or six items, i felt a heavy thrust on my chest. it almost felt like a dumbbell dropped on my chest.
>> did she say anything to you?
>> i'd say after maybe three seconds passed, i felt another large thrust on the chest and then she said, oh, my god, you're bleeding. i think i hurt you.
>> there wasn't a lot of blood and he said the pain wasn't severe so he wasn't sure what happened.
>> i saw one wound and it didn't look deep or anything. i thought maybe she had a seizure and fell on me or did something, but now i've come back to reality because she's helping me get out of the chair.
>> paul said sheila seemed to panic when he started to bleed so he took charge, telling her to call an ambulance.
>> i said all right, call 911. she gets on her phone. i hear her my husband's been hurt, please hurry.
>> in her conversation with the detective, sheila did seem distraught at times.
>> tell me -- i want to hear what happened. you told me --
>> i don't know.
>> sheila , i don't want you to be embarrassed.
>> i am embarrassed and i don't want to talk about this.
>> it took a while, but sheila finally admitted to the game. she did cut paul , but said it was an accident.
>> how did you accidentally slice him?
>> we were playing and it got out of hand.
>> i kept saying i just don't understand, sheila , you have to explain it to me.
>> well, i don't believe you meant to hurt him. i'm not saying you meant to hurt him.
>> sheila insisted she wanted to save paul 's life, but after that 911 call, no ambulance came and that's when she drove him to the hospital.
>> if i wanted to hurt him, i would have never come to the hospital.
>> but it was at the hospital right there in the parking lot that the case of the husband, the wife and the game took an unexpected turn. police spotted sheila 's cell phone lying on the ground. you know, the one she used to call 911.
>> i'm thinking i'm going to find 911 on the phone that she had called for help for her husband. we didn't find that call on the cell phone , but we did notice after he was injured that she called a gentleman by the name of nelson.
>> in fact the detective learned while paul lay bleeding in their apartment, his wife never called 911. the only call she made was to anna - lisa raymundo's boyfriend, nelson sessler.
>> so here's the question. why would sheila davalloo , who had just stabbed her husband, call nelson sessler? what's the link between those two? and what did it have to do with the murder of anna - lisa ?
>> two stabbings in a short period of time, and they were both connected to nelson. something does not make sense.
>> when "obsession" continues. t on