Prosecutors investigating the ferry disaster off the southwest coast on Sunday summoned the brother of the dubious businessman and cult leader Yoo Byung-eon, who owns ferry operator Chonghaejin Marine.
Yoo Byong-il (75) was apparently paid W2.5 million (US$1=W1,026) a month by Chonghaejin, where he is listed as an advisor.
Prosecutors also summoned Yoo Dae-gyun (44), Yoo Byung-eon's eldest son who is the largest shareholder of the parent company of Chonghaejin Marine and owns the biggest stakes in three major subsidiaries.
Prosecutors believe Yoo Dae-gyun and his younger brother Hyuk-ki (42) embezzled funds from Chonghaejin at the instructions of their father.
Prosecutors plan to indict Yoo Dae-gyun and summon his father for questioning.
Veteran soap actress Jeon Yang-ja (72) was questioned by prosecutors for around 10 hours on Saturday. She is registered as the owner of the cult's headquarters and head of two of Yoo's businesses, Kukje Video & Film Production and Norunja Shopping.
Speaking to reporters, Jeon denied embezzling company funds or having received management instructions from Yoo. Prosecutors plan to question her one more time before deciding whether to indict her.