Park said at a Cabinet briefing, "What the captain and part of the crew did is unfathomable from the viewpoint of common sense. Unforgivable, murderous behavior." The comments were posted on the website of the presidential Blue House.
Park said instead of following a marine traffic controller's instructions to "make the passengers escape," the captain "told the passengers to stay put while they themselves became the first to escape."
"Legally and ethically," she said, "this is an unimaginable act."
The captain, Lee Joon-seok, and two crew members have been arrested on suspicion of negligence and abandoning people in need, and prosecutors said Monday that four other crew members have been detained. Senior prosecutor Ahn Sang-don said prosecutors would decide within 48 hours whether to seek arrest warrants for the four: two first mates, a second mate and a chief engineer.
Lee, 68, has said he waited to issue an evacuation order because the current was strong, the water was cold and passengers could have drifted away before help arrived. But maritime experts said he could have ordered passengers to the deck — where they would have had a greater chance of survival — without telling them to abandon ship.
Video showed that Lee was among the first people rescued. Some of his crew said he had been hurt, but a doctor who treated him said he had only light injuries.
Lee spoke of "pain in the left rib and in the back, but that was it," said Jang Ki-joon, director of the orthopedic department at Jindo Hankook University. Jang said he did not realize Lee was the captain until after he treated him.
Many relatives of the dead and missing also have been critical of the government, which drew more outrage Monday with the resignation of Song Young-chur, a high-ranking official in the Ministry of Security and Public Administration.
Song, chief of the Regional Development Policy Bureau, reportedly tried to take a commemorative photo Sunday evening of the situation room on Jindo, an island near the sunken ferry, where government officials brief relatives of the missing.
Yonhap news agency reported that one family member shouted, "We are a nervous wreck here, and this is something to commemorate for you?"
Blue House spokesman Min Kyung-wook said the government accepted Song's resignation "as a warning to others, as he has raised public resentment by trying to take commemorative photos without understanding the feeling of the families of the victims and lost persons."
It was the latest of several missteps. Soon after the sinking the government announced that 368 passengers had been saved; the real number is just 174. Some relatives of the missing issued a statement saying that hours after the ship sank, no one from the government was available to brief them and they were turned back when they tried to get closer to the accident site.
There also has been criticism of the government's emergency preparedness. Various ministries set up "central emergency centers" across the country without coordinating their efforts. Some leaders lacked experience in disaster relief, including the deputy head of the Central Relief Center, who formerly led the National Archives of Korea.
Government officials have complained about false reports, and on Sunday night police arrested a woman on libel charges. Hong Ga-hye, 26, was introduced as a civilian diver in a South Korean cable news interview Friday in which she said rescue aid was not arriving as promised and that a diver communicated with a survivor through a wall of the sunken ferry, claims that authorities say were false. A sobbing Hong apologized to victims' families after appearing at a police station.
About 250 of the missing and dead are students from a single high school near Seoul who were on their way to the southern tourist island of Jeju.