Plotnikov immigrated to Canada in 2005 from Russia at the age of 15, Gitman said about him: "He wasn't comfortable here; he was looking for something and I don't think he found it here." After graduating from high school, Plotnikov joined
Seneca College and traveled to other countries with the school's
international tourism program. He also began reflecting about human existence, searching for an answer in holy books of the three
Abrahamic religions. He took interest in Islam around 2008 and in 2009 he visited an unknown Toronto mosque, where his father said his son came into contact with "a mullah who had very radical views." Soon, Plotnikov adopted and observed strict Muslim customs, isolated himself from his friends and cut off most communication with his family. In September 2010, Plotnikov disappeared, leaving a note that he was going to France for
Ramadan. After several months, his parents found out he was living in
Moscow with a friend from Toronto. Later, he traveled to the Russian republic of
Dagestan and took a residence in the mostly ethnic
Kumyk village of Utamysh,
Kayakentsky District, His concerned father called the Russian
Ministry of Internal Affairs, and the police subsequently raided the house where William stayed and briefly detained and interrogated him. Upon his release, William then returned to Moscow, but soon made his way back to Dagestan and joined an armed Islamist rebel group based in the forested mountain range near Utamysh, In an overnight battle, during which the farm was destroyed by artillery fire, According to
National Post, he "is believed to be the first Canadian convert to die fighting in the name of
jihad." Plotnikov was also the second known Canadian to be killed in the
North Caucasus conflict; in 2004, Russian forces said they killed a Canadian citizen named
Rudwan Khalil in
Chechnya. His father flew to Dagestan and Russian authorities agreed to release his son's body, which he then buried in Utamysh according to local Muslim traditions. ==Alleged links to Tamerlan Tsarnaev==