Robert Hanssen, the former FBI agent caught selling damaging secrets to the Russians during and after the Cold War, died of natural causes last month inside Colorado’s notorious Supermax prison, the El Paso County coroner found.
An autopsy conducted by the coroner ruled Hanssen, 79, died of metastatic colon adenocarcinoma — or colon cancer.
He was found dead in his cell June 5 at the U.S. Penitentiary ADMAX in Florence.
