WASHINGTON — Robert Hanssen, a former FBI agent who took more than $1.4 million in cash and diamonds to trade secrets with Moscow in one of the most notorious spying cases in American history, died in prison Monday.
Hanssen, 79, was found unresponsive in his cell at a federal prison in Florence, Colorado, and later pronounced dead, prison officials said. He is believed to have died of natural causes, a person familiar with the matter told The Associated Press. The person was not authorized to publicly discuss details of Hanssen's death and spoke to the AP on condition of anonymity.
