Emergency murder

by Janet McGiffin One night a Doctor watched a woman entered ER. She called the doctor's name and showed the difficulty in breathing. Suddenly she was dead. she was a wife of a surgeon who the doctor knows. A healthy woman in 30's without a heart problem was dead. Finally,after a blood test, it turned out that she was poisoned by "Tetrodotoxin"; the puffer fish' poison. Who had poisoned a rich woman?