Police in the Philippines may not have an easy time extraditing the widow of a murdered Fredericton businessman, according to a law student.

Police have charged Jane Doyle and three men in the shooting death of Harry Doyle in Surigao City on Aug. 12. The men reportedly include Doyle’s driver and bodyguard who lived in a resort owned by the couple in the Philippines.

Jane Doyle is believed to still be in Fredericton after attending a memorial service for her late husband in mid-August.

Jose Casares, a law student at the University of Manitoba, who has studied the extradition treaty between Canada and the Philippines, points out a 2002 decision by the Ontario Court of Appeal that blocked the extradition of a high-profile murder suspect who had come to Canada.

"To quote them, they think it will, 'sufficiently shock the conscience of Canadians.' That's how they describe the criminal procedures and punishments in the Philippines," Casares said.

Casares said extradition hearings in Canada must also consider whether evidence gathered in the foreign country conforms to Canadian standards.

Prosecutors in the Philippines have 30 days to decide whether to issue a warrant for Jane Doyle.

Rose-Marie Almazan, a police investigator in the Philippines, said the police believe Jane Doyle worked with the three other men to arrange the killing.

She said Canadian embassy officials have promised a quick arrest if a warrant is issued.

"It would only take one day to hold the suspect for us over there in Canada," she said.

Despite these assurances, Casares said it could make it very difficult to get Doyle, who is a citizen of the Philippines, back to the country to face the charges.