'Serial stowaway' boards London-bound plane

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Chicago Police Department via AP

She then took a shuttle to the worldwide terminal and a day later she boarded the London-bound British Airways flight.

Less than two weeks after Marilyn Hartman was granted freedom to transfer out of a high-security locked psychiatric facility, the so-called "serial stowaway" was ordered held on $200,000 bond following another airport arrest.NBC 5's Marion Brooks reports.

Guglielmi says Hartman this week got through a federal Transportation Security Administration checkpoint at a domestic terminal without a ticket before taking a shuttle to the worldwide terminal.

"The defendant then hid in a small room in the side before quickly walking past a U.S. Customs and Border Protection Agent who was looking at passports of individuals", said Assistant Cook County State's Attorney Maria McCarthy.

She was charged with one misdemeanor count of criminal trespassing and one felony count of theft greater than $500, in connection with the cost of the plane ticket that she did not possess. The pesky passenger was sent back to the USA when she couldn't produce a passport and was arrested Thursday upon arrival at O'Hare. She then slept overnight at the airport after which she boarded a flight to London without a ticket the next day, prosecutors said Saturday. This time, she made it to London.

Hartman has tried to get on planes without a ticket several times.

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The Chicago Department of Aviation released a statement, advising that no passengers had been put at risk by the episode.

Instead, the agency released a statement saying, "This matter is subject to an ongoing investigation and TSA is working closely with our law enforcement and airline partners in that effort", according to the Chicago Tribune. "During the initial investigation it was determined that the passenger was screened at the security checkpoint before boarding a flight".

Hartman was living at an apartment facility for low-income seniors before her latest arrest and is due in court on Saturday. Her movements were caught on video.

In 2016 she pleaded guilty to a trespassing charge and was sentenced to six months at a mental health facility, after she was found at a bus terminal at O'Hare.

She has said that homelessness drove her to take "desperate measures" and that she feels safer in airports than in the streets.

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