Korean Air heiress Cho Hyun-ah appeared for a questioning at the Korea Immigration Service in Seoul at lunchtime Thursday, some three years after she made global headlines with the "nut rage" scandal.
This time, she is being questioned on charges of illegally hiring Filipino housemaids.
Cho and her mother Lee Myung-hee allegedly forged documents to disguise several Filipinos as vocational trainees for Korean Air but actually employed them as maids.
The Korea Immigration Service said it has testimony from Korean Air staffers who were questioned earlier in the snowballing scandal engulfing the family.
Cho and her mother apparently preferred foreign maids because they were concerned about their privacy if Koreans got too close a look at them.
The Korean Air owner family is under investigation over a series of allegations ranging from assault and abuse of staff to smuggling luxury goods.