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Allan Lanteigne, who was found dead in his home on Ossington Avenue in March 2011.

A suspended lawyer and husband of a man found dead in his home last year has been charged with first-degree murder. The lifeless body of Allan Lanteigne, 49, was discovered on the afternoon of March 3, 2011, when police responded to a call from 934 Ossington Ave.

Mr. Lanteigne, who worked two jobs as an accounting clerk at the University of Toronto and at a catering company, had obvious signs of trauma to his body. Police determined he was last known to be alive the previous day when he left work around 5 p.m. He reached home about 30 minutes later, according to a written statement from police.

Mr. Lanteigne's husband, Demitry Papasotiriou, had been a person of interest early on in the investigation, said Detective Tam Bui, with the Toronto Police Service's homicide investigation. Mr. Papasotiriou, 32, was arrested in a motor vehicle in downtown Toronto Friday afternoon. During the last year, he had been spending some time pursuing a law doctorate in Switzerland.

Police are still looking for another suspect in the homicide investigation. They issued an arrest warrant on Friday for Mladen Ivezic, 52, of Mississauga. Mr. Ivezic is believed to be in Europe, and Toronto police are working with Interpol and other European authorities to determine his exact whereabouts.

Mr. Papasotiriou is a citizen of Canada and Greece. Det. Bui refused to elaborate on the timeline of his travel, or Mr. Ivezic's relationship with Mr. Lanteigne, saying only that this information would be presented as evidence in court.

Police are also not releasing Mr. Lanteigne's cause of death at this time. Mr. Lanteigne was born and raised in Saint John. He moved to Toronto to look for employment and because he had friends in the city.

His brother-in-law, Dan Sterritt, flew in from New Brunswick to talk to police about the arrest. He described Mr. Lanteigne as the "favourite uncle" to several nephews and nieces, and the baby brother his older sisters helped raise with their mother.

"He was kind and generous to a fault," Mr. Sterritt said.

Family was important to Mr. Lanteigne. He always remembered to call on birthdays and organized the annual summertime family reunions in Saint John, where the bulk of his family still lived.

"He always said that he would have loved to live in both places [Toronto and Saint John] at the same time," Mr. Sterritt said.

But Mr. Lanteigne, who got married around 2004, seemed to become more distant in the two years preceding his death, Mr. Sterritt indicated. He missed the reunions, saying he was too busy with work. Mr. Lanteigne, who had always introduced his previous boyfriends to his family, never brought his new husband home. "The last time Allan was home, he commented that Demitry wouldn't fit in with us and he probably wouldn't bring him home," Mr. Sterritt said.

Police won't comment on the nature of the relationship between the couple, but Mr. Sterritt said the family heard from Mr. Lanteigne's friends after his death that the relationship had been strained.

Mr. Papasotiriou is listed as a "suspended" lawyer on the Law Society of Upper Canada's website after he "was found to have engaged in professional misconduct," according to the website. On Sept. 10, a hearing panel fined him $1,000 and barred him from practiscing law or providing legal services for four months.

His alleged co-conspirator, Mr. Ivezic, is a business partner in two firms, Healthsonix Inc. and Healthsonix Medical Inc., according to Toronto police. Both firms are listed on the Ontario Securities Commission as businesses that may pose a risk to investors.

The Lanteigne family obtained legal counsel after police advised them that Mr. Papasotiriou had filed two lawsuits challenging the insurance companies that are supposed to pay out Mr. Lanteigne's life insurance. Mr. Papasotiriou is listed as the beneficiary, but the firms have not paid out because of the ongoing homicide investigation.

Jane Martin, the family's counsel, is introducing a motion to add the family to Mr. Papasotiriou's proceedings. The lawsuits were filed sometime this spring, Ms. Martin said.

Mr. Sterritt said the entire ordeal has been "a very dark event" for Mr. Lanteigne's family. He said they keep waiting for it to end like a television crime show, but they realize the reality that Mr. Lanteigne is now a memory.

"When you lose someone to something so senseless and tragic as a murder," he said, "it's almost incomprehensible."

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