The identification and business card of former FBI agent Robert Hanssen are seen inside a display case at the FBI Academy in Quantico, Virginia, May 12, 2009. Paul J. Richards/AFP via Getty Images.

Robert Hanssen, a former FBI agent who received more than $1.4 million for committing espionage on behalf of Moscow, died in prison, officials said.

2001-05-28 04:00:00 PDT Washington-- An FBI agent arrested in 1996 for spying for Moscow told investigators after his arrest that he knew of suspicious activity by fellow agent Robert Hanssen that ...

FBI agent-turned-traitor Robert Hanssen, who spied for the old Soviet Union and later the Russians, died Monday in the cell where he was serving 15 consecutive life sentences for betraying his ...

Eric O’Neill took to Twitter, saying he regrets not asking Robert Hanssen -- the former FBI agent who was sentenced to life in prison in 2002 for spying on America for Russia -- why he betrayed ...

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 ...

Agent Robert Philip Hanssen is shown in this undated file photo, released by the FBI. But government officials said Hanssen led a secret double life working for the Soviets for more than 15 years.

WASHINGTON — Robert Hanssen, a former FBI agent who took more than $1.4 million in cash and diamonds to trade secrets with Russia and the Soviet Union in one of the most notorious spying cases ...

Former FBI agent Robert Hanssen, who was convicted of having spied for the Soviet Union and Russia for decades, was found dead in his prison cell Monday, authorities confirmed.

WASHINGTON, June 5 (Reuters) - Robert Hanssen, the former FBI agent turned spy whom the bureau describes as the most damaging in its history, was found dead in his prison cell on Monday, U.S ...

FBI agent Eric O’Neill, who was just 26 when he went undercover to help catch traitor Robert Hanssen, tweeted following the spy’s death that he’d hoped for one final face-to-face meeting ...

Robert Hanssen, a former FBI agent who was one of the most damaging spies in American history, was found dead in his prison cell Monday morning, according to the Bureau of Prisons.