The sharp turn came between 8:48 a.m. and 8:49 a.m., but it’s not known whether it was done voluntarily or because of some external factor, said Nam Jae-heon, a spokesman for the Maritime Ministry.
Another angle being probed is the role of the captain, 68-year-old Lee Joon-seok.
Senior prosecutor Yang Jung-jin said Lee was detained early Saturday, along with the two crew members. Lee faces five charges including negligence of duty and violation of maritime law, according to the Yonhap news agency.
Yang said earlier that Lee was not on the bridge when the ferry was passing through an area with many islands clustered closely together, something he said is required by law so the captain can help a mate make a turn. The captain also abandoned people in need of help and rescue, he said.
“The captain escaped before the passengers,” Yang said.
Two crewmembers on the bridge of the ferry — a 25-year-old woman and a 55-year-old helmsman — also failed to reduce speed near the islands and conducted a sharp turn, Yang said. They also did not carry out necessary measures to save lives, he said.
Another focus of the investigation is that a quicker evacuation order by the captain could have saved lives.
Police said the vice principal who was found hanged from a tree on Jindo, an island near the sunken ship where survivors have been housed, had been rescued from the ferry.
Identified as Kang Min-kyu, he was the leader of the students traveling on a school excursion. In his suicide note, Kang said he felt guilty for surviving and wanted to take responsibility for what happened because he had led the trip, according to police.
He asked that his body be cremated and the ashes scattered where the ferry went down.