Jamaican police said on Tuesday that the 58-year-old's death was being treated as "suspicious".
Former England batsman Woolmer was found unconscious in his Kingston hotel room less than 24 hours after Pakistan's shock World Cup defeat by Ireland which knocked them out of the tournament. He was pronounced dead in hospital later that day.
"I suppose there is always the possibility, I mean some of the cricket fraternity fans are extremely volatile and passionate about the game and about what happens in the game... so I suppose there is always the possibility that it could be that (murder)," she said in an interview with Sky Sports.
"It fills me with horror. I just can't believe that people would behave like that or that anyone would want to harm someone who has done such a great service to international cricket."
A statement from Jamaican police on Wednesday said that a second pathologist's opinion was being sought.
"Following consultations today involving representatives from the government of Jamaica and the police, a decision was taken to seek the opinion of a second pathologist," police spokesman Karl Angell said in the e-mailed statement.
"Arrangements are currently being made to engage the services of this pathologist."
'GOT DEPRESSED'
Gill Woolmer said in the Sky interview her husband was "depressed" after Pakistan's defeat but ruled out suicide, adding that he was fit and had been trying to lose weight because of diabetes.
"He was very depressed and he sent me an email to that effect, but he always got depressed and down when the boys didn't do as he expected and hoped," she said.
"But that was normal in any competition, he was a very competitive person. But there's no way that suicide was involved, he would never ever..."
She said that she was waiting for the results of a second pathologist's report before her husband's body could be flown home to South Africa.
"They have given me some indication of why they think it's suspicious but I'm not prepared to say what," she added.
Conspiracy theories have abounded since Woolmer's death, with claims in some media that he had been murdered by a match-fixing syndicate.
Pakistan won their final rain-affected match on Wednesday when they beat Zimbabwe by 93 runs.
