"Katherine and her family continue to be deeply saddened by the harm that has been caused," DeLuca said Tuesday.
Terrel Harris, a spokesman for the Department of Public Safety, said Tuesday evening that the state had not yet received Russell's request to release her husband's body.
He said arrangements must be made to release the body and once that happens a death certificate will be filed and the cause of death made public. He said it is too soon to speculate on when that might happen.
Contributing to this report were Associated Press writers Michelle R. Smith in Providence; Rodrique Ngowi in Boston; Lynn Berry in Moscow; Arsen Mollyaev in Makhachkala, Russia; and Eric Tucker, Alicia A. Caldwell, Eileen Sullivan and AP Intelligence Writer Kimberly Dozier in Washington.