Shortly thereafter he was given another title shot opportunity at a rematch scheduled for December 13 for which he was training,[2] he also had three big matches coming up,[3] but on November 8, 1995, Kobozev was reported missing by his girlfriend Lina Cherskikh.

In 1990 Kobozev went to the United States, he lived in a fourth-floor apartment on 16th Street in a working-class section of Sheepshead Bay with his live-in companion Yelena Cherskikh, and her 7-year-old son, Vitaly.

He received a shot at the WBC title vacated by recently retired Anaclet Wamba, for which Kobozev fought Marcelo Fabian Dominguez in Paris and lost via a controversial decision.

The mystery surrounding his death was solved when his bones were found by the FBI in March 1999 in the backyard of the Russian Mafia's #2: Alexander Spitchenko in Livingston, New Jersey, United States.

Prosecutors said that the Russian mob allegedly turned against Kobozev because he worked as a part-time security guard at a Brooklyn restaurant from which Nosov was ejected after a fight with a musician.