Park faces charges of bribery, abuse of power, coercion and leaking government secrets in connection with a scandal involving her longtime friend Choi Soon-sil.
"A lot of evidence has been collected so far, but as the suspect denies most of the criminal allegations, there is a possibility of her destroying evidence," the prosecution said in a statement.
"It would be unfair not to seek a warrant considering that her accomplice Choi Soon-sil, as well as those government officials who followed her direction and the ones who gave kickbacks have all been detained," it said.
Park has been accused of letting Choi meddle in state affairs and amass profits by exerting influence based on her ties to the former president.
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