Actually, story is reasonably well known within USG in DC area. Scott Carmichael, DIA CI SA, wrote pretty good (and approved) book on case. But unfortunate facts remains that (1) DGI recruited her and ran her in place for a long time using reasonable standard of tradecraft and (2) she beat polygraph. DIA has now joined CIA and NSA in requiring polygraphs for all employees or assignees with staff-like access.)
Ana Montes did much harm spying for Cuba. Chances are, you haven’t heard of her
Washington Post, April 18, 2013
Ana Montes has been locked up for a decade with some of the most frightening women in America. Once a highly decorated U.S. intelligence analyst with a two-bedroom co-op in Cleveland Park, Montes today lives in a two-bunk cell in the highest-security women’s prison in the nation. Her neighbors have included a former homemaker who strangled a pregnant woman to get her baby, a longtime nurse who killed four patients with massive injections of adrenaline, and Lynette “Squeaky” Fromme, the Charles Manson groupie who tried to assassinate President Ford.
But hard time in the Lizzie Borden ward of a Texas prison hasn’t softened the former Defense Department wunderkind. Years after she was caught spying for Cuba, Montes remains defiant. “Prison is one of the last places I would have ever chosen to be in, but some things in life are worth going to prison for,” Montes writes in a 14-page handwritten letter to a relative. “Or worth doing and then killing yourself before you have to spend too much time in prison.”
Like Aldrich Ames and Robert Hanssen before her, Ana Montes blindsided the intelligence community with brazen acts of treason. By day, she was a buttoned-down GS-14 in a Defense Intelligence Agency cubicle. By night, she was on the clock for Fidel Castro, listening to coded messages over shortwave radio, passing encrypted files to handlers in crowded restaurants and slipping undetected into Cuba wearing a wig and clutching a phony passport.