Top Coast Guard officials, including Commissioner General Jeong Bong-hun, tendered their resignations on Friday over a controversial case involving a South Korean fisheries official killed by North Korean military two years ago.
The Coast Guard recently retracted its previous claim that the official was attempting to defect to the North a crime in South Korea citing lack of evidence.
The presidential office says their resignations will not be approved because a probe is still ongoing.
Closely watching the probe are the bereaved family who had denied from the start that the man had intended to defect.
The same day, they met with lawmakers of the ruling People Power Party in the hope of more quickly uncovering the truth, which they believe to have been covered up.
"I tried to find out what President [Moon] was doing six hours after my brother was confirmed to be alive. But access to the classified presidential document has been completely denied."
The PPP backing President Yoon Suk-yeol's own pledge to re-investigate the case has repeatedly called for the presidential document's disclosure, citing information from other government agencies.
"We found that no rescue order was given by President Moon Jae-in despite the confirmation of his survival and that the government covered up this case for one day."
The Democratic Party is claiming the PPP is trying to take political revenge.
The DP, instead, has proposed that if the PPP really wants to know the truth, then they could consider disclosing ultra-top-secret military documents potentially at the cost of a security breach.
"All of our intelligence tactics will be exposed. Is it so important that we can accept that cost to find out how they drew the conclusion that he defected?"
"To disclose the classified presidential document would require the support of at least two-thirds of the Assembly.
On Monday, the bereaved family is going to request cooperation from the DP, which holds a majority.
Lee Kyung-eun, Arirang News."