Yafee was seen smiling as the verdict was read.
Because Gerhartsreiter is still an illegal immigrant, having come to the U.S. from Bavaria on a student visa, he will face federal deportation proceedings after he serves out his sentence, Suffolk County District Attorney Dan Conley told ABC News.
As this case winds down, another may be heating up. Conley told ABC News that a federal grand jury is convening in California in the 1985 disappearance of a newlywed couple. Gerhartsreiter, who was using yet another name at the time, was living in the couple's guest house, has been eyed by authorities in the case, but not charged.
Conley praised the work of Boston Police Detectives Sgt. Ray Mosher and Det. Joseph Lehman on the kidnapping trial.
"They lived and they worked it from day one," he said.
The prosecution had dismissed the insanity theory throughout the trial and referred to Gerhartsreiter by his real name. During his closing arguments, Assistant District Attorney David Deakin implored the jury not to buy into it.
"Don't let him get away with that," Deakin said, "Don't let this insanity defense be the culminating manipulation in a lifetime of lies designed to try and get what he wanted."
Bizarre details of Gerhartsreiter's three decades of deception came fast and furious during the trial, with witnesses recounting a litany of fantastic tales that were alternately flamboyant or strange, or both.
Gerhartsreiter, who had claimed that his daughter Reigh communicated with him telepathically the day she was kidnapped, had a history of passing himself off ot only as a Rockefeller, but as a rocket scientist and a cardiovascular surgeon, among other professions.
Gerhartsreiter's ex-wife, Sandra Boss, testified last week that he never held a job but meanly withheld money and food from her, and in winter would only heat the part of the house where he slept.
When pressed to get a job himself, she claimed that he replied it would be "beneath a Rockefeller."
Boss, a graduate of Harvard School of Business, told the court today that she earned about $40,000 a week, but her finances were completely controlled by her husband.
She also testified that he convinced his wife he was a member of the Tri-Lateral Commission, a private organization of prominent citizens who advise governments on international cooperation.
"He called it 'The Group,'" Boss said. He even flew to Texas for bogus meetings, she testified.
At one point, she said, Gerhartsreiter, who claimed to advise poor nations on debt renegotiations, complained that his "clients" blamed him for the collapse of the Asian market.
Deakin said he was going to call Boss and let her know about the verdict.
"We expect Sandra will be very pleased with the result," he told ABC News.
Boss claimed that her husband spent all their money, but balked at selling a painting from a collection he claimed was worth $1 billion.
Denner questioned Boss on how a "dynamic" and "vibrant" woman who advised politicians and corporations about their business affairs could not manage to obtain a divorce lawyer.
"I was frightened," Boss testified, adding that her husband began to display a volatile temper shortly after they were married. "My professional life was not scary. My personal life was."