Prosecutors rang the bell for hours since Tuesday morning, and when that didn't help, they raided Yoo Dae-gyun's house, along with police and firemen, but failed to arrest him as there were no signs of his whereabouts meaning he likely fled to a hiding place.
Yoo Dae-gyun is the first son of Yoo Byung-eon.
Prosecutors had been granted an arrest warrant for Yoo Dae-gyun as he did not appear for questioning scheduled for Monday.
But he's not the only person who isn't cooperating with the probe his siblings, who are said to be abroad, failed to show up too.
The Yoo family and its close associates are suspected of being involved in embezzlement and tax evasion, and having a direct connection to the ferry sinking, as safety measures were ignored in renovating the ship, and also during the process of overloading cargo.
The latest investigations have revealed that Yoo Byung-eon was involved in the management of the ferry.
That's why the joint investigation team believes Yoo could be the top person in charge, and the person most responsible for the disaster.
Yoo was summoned Tuesday to appear before prosecutors on Friday.
Meanwhile, the Financial Supervisory Service says it began a new probe, a couple of days ago, on the National Federation of Fisheries Cooperatives and Shinhan Capital, which have granted loans to Yoo Byung-eon's associates in the past.
This comes as financial authorities vowed to leave no stone unturned with relation to Yoo's finances.
Kwon Soa, Arirang News.