Following last month’s ferry sinking that left more than 300 passengers missing or dead, prosecutors are seeking to arrest the company’s president over claims of misconduct. According to the Associated Press, prosecutors have requested a warrant for the arrest of Kim Han-sik, the president of Chonghaejin Marine Co. Ltd.

Investigators are looking into suspicions that the sinking was caused by cargo overloading or improper stowage. Four employees who handled the usnken ships cargo have already been arrested.

Kim was detained on Thursday, but not formally arrested, on charges that he was aware of the boat’s issues but did not act on that knowledge.

The continuing search for victims has been a struggle for South Korean authorities. As of Friday, 273 bodies have been recovered and 31 are still missing. On Tuesday, a civilian diver searching the wreckage fell unconscious and died, and on Wednesday, the government announced that it had incorrectly tallied the number of survivors; 172, not 174.

Angry parents have criticized the government’s response to the tragedy, and the country’s prime minister has already resigned because of it. Now, South Korea’s president, Park Geun-hye, is seeing her approval ratings drop and some are also calling for her resignation as well.