Woo Byung-woo, former senior presidential secretary for civil affairs, was called in for multiple charges including abuse of power and dereliction of duty, Xinhua news agency reported.
It was the third time that Woo appeared in the prosecutors' office for questioning.
Last November, he was interrogated for embezzlement and breach of duty in the management of a company his family controls.
In February, he was questioned by special prosecutors who had investigated the corruption scandal that led to Park's impeachment and arrest.
Since March, the investigation has been taken over by the special investigation headquarters of the Seoul Central District Prosecutors' Office which summoned Woo.
Woo is suspected of assisting or at least conniving at Choi Soon-sil's meddling in state affairs behind the scenes.
Choi is Park's close friend who is at the centre of the corruption scandal and is now in custody.
He is also accused of intervening in the appointment of government officials, inspecting civilians and affecting the probe into the Sewol ferry disaster that claimed 304 lives, mostly high school students.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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