AUTHORITIES in the US are trying to determine whether a Northern California man's anger over complications he suffered from a 2010 surgery prompted him to go on a shooting rampage at a Nevada urologist's office, killing one doctor and critically wounding another before committing suicide.
Reno Police Lieutenant William Rulla said on Friday detectives were working to obtain Alan Oliver Frazier's medical records to learn more about his physical and mental health.
Frazier, 51, made it clear in a suicide note that he had planned the attack and that his "focus was on the physicians at the specific office," Rulla said. Police recovered the note at Frazier's home.
Investigators have declined to specify the kind of surgery he had or say whether the doctors he targeted had anything to do with it.
But a couple who lived across the street from Frazier at Lake Almanor, about 130 miles north of Reno, said the operation he had had was a vasectomy. They also said Frazier frequently posted complaints in an online chat group about the pain he suffered from what he claimed was a botched surgery.
An international expert in men's reproductive health care said that while it's uncommon, some men experience pain more than two years after a vasectomy.
Neighbour Mario Tognotti told The Associated Press on Friday that Frazier told him and his wife that he sought help from doctors for his pain and had approached a lawyer about the situation. Tognotti declined to comment further.
His wife, Jari Tognotti, told the Reno Gazette-Journal in an email Thursday that Frazier encouraged friends to learn more about the kind of painful allergic reactions that men like him sometimes suffered as a result of vasectomies. She said it involved "immune-type reactions while their bodies are trying to absorb the sperm."
Dr Paul Turek, president of the Society of Male Reproduction and Urology, said that while vasectomies remain among the safest forms of permanent contraception, there are potential short- and long-term side effects. He declined to comment on Frazier's case, but noted about 60 to 70 per cent of men who undergo vasectomies develop an allergy to their sperm in the form of "antisperm antibodies."
Turek also said it's rare but possible to experience pain more than two years after a vasectomy.
"Developing over time can be a low-grade discomfort in the scrotum that's basically relieved by reversals because it's due to congestion that causes back pressure," Turek said.
Any sperm allergy appears to be localised to the immune systems on reproductive tracts, he said, and antisperm antibodies have not been shown conclusively to have any significant effect on other organs.
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