A South Korean protester participates in a rally calling for President Park Geun-hye to step down in downtown Seoul, South Korea, Tuesday, Nov. 1, 2016. South Korean police detained a man who rammed a large excavator into a gate Tuesday near the office where prosecutors questioned a woman at the center of a scandal that threatens the country's president. The woman had earlier said she "deserves death" and the detained man said he "came here to help her die." The letters read "Park Geun-hye should step down." (AP Photo/Ahn Young-joon)
A South Korean protester participates in a rally calling for President Park Geun-hye to step down in downtown Seoul, South Korea, Tuesday, Nov. 1, 2016. South Korean police detained a man who rammed a large excavator into a gate Tuesday near the office where prosecutors questioned a woman at the center of a scandal that threatens the country's president. The woman had earlier said she "deserves death" and the detained man said he "came here to help her die." The letters read "Park Geun-hye should step down." (AP Photo/Ahn Young-joon) Credit: Ahn Young-joon

Tokyo — The woman accused of acting as South Korea’s “shadow president” has been jailed under emergency detention laws, as prosecutors question her about what exact role she played for the real president, Park Geun-hye.

Park is facing the worst crisis of her tumultuous four-year presidency after allegations that Choi Soon-sil, her close friend of four decades, has had undue influence on state affairs.

The case has incensed the country to the point where early on Tuesday, a 45-year-old man drove an excavator from a town about 150 miles south of Seoul and into the prosecutors’ office where Choi is being held, destroying the door. He later told police he wanted to “help Choi Soon-sil die as she said she committed a sin that deserves death,” the Yonhap news agency reported.

The Seoul central district prosecutors’ office has 48 hours to seek a warrant to formally arrest Choi, who is 60.

“Choi has denied all of the charges against her, and we’re concerned that she may destroy evidence,” a prosecution official said, according to Yonhap.

Fear of evidence destruction, as well as being a flight risk, are among the justifications for emergency detention.

“She has fled overseas in the past, and she doesn’t have a permanent address in South Korea, making her a flight risk,” the official told reporters. “She is also in an extremely unstable psychological state, and it’s possible an unexpected event could occur if she is released.”

Even in a country all too familiar with corruption scandals and noted for its explosive political crises, the current debacle is exceptional.

Choi is the daughter of the late Choi Tae-min, a kind of shaman-fortune teller who was close to Park’s father, Park Chung-hee, the military dictator who ruled South Korea during the 1960s and 1970s.

When Park’s mother was assassinated in 1974, Choi Tae-min became so close to the young Park that a U.S. Embassy cable once described him as a “Korean Rasputin.”

The Munhwa Ilbo newspaper reported last week that Choi Tae-min, who founded a religious cult that incorporated elements of Christianity and Buddhism, would “deliver messages” to Park from her dead mother.