The leader of the Church of God is Rev. Joo Chul Kim. He was born in Pohang in 1960, the youngest of two boys and two girls, and joined the Church of God with his mother, Mrs. Park. Around 1982, he was assigned as the pastor of the Seoul Church. At that time, there was an evangelist named Gilja Jang in the Seoul Church. Evangelist Jang introduced him to a woman who later turned out to be the cousin of Evangelist Jang's husband, Mr. Kim Jae-hoon. Their marriage brought Jang Gil-jah and Kim Joo-chul into close contact.

However, the sudden death of Pastor Ahn Sang-hong in 1985 threw the Church of God into turmoil, and it was Kim Joo-cheol who stepped in to clean up the mess. Unlike the Busan members, Jang Gil-jah and Kim Ju-cheol did not attend Ahn's funeral in Busan. They were plotting to take control of the church.

According to testimony from members of the Busan church, Kim withdrew 3 million won from a bank account kept at the church and has yet to return it. After the funeral, the Seoul church convened an emergency general assembly and proclaimed Jang Gil-jah as Ahn's bride using Ahn and Jang's wedding photo, but following backlash from Busan church members, Kim reportedly apologized to the congregation in a handwritten memorandum. Kim Joo-cheol had vowed not to idolize Jang Gil-jah, or even himself, but soon afterward he broke his promise by making Jang Gil-jah his god.

According to the testimony of Pastor Ahn's wife, Ms. Hwang, Kim Joo-cheol demanded that Pastor Ahn's body be taken for himself throughout the night. However, when Mr. Hwang objected, saying that the bereaved family was alive and in their care, Kim Joo-cheol left in great disappointment. We don't know what Kim Joo-cheol intended to do with Ahn Sang-hong's body, but we can only marvel at his bizarre behavior.

After splitting from the Busan Church, the newly founded Seoul Church renamed itself the Ahnsahnghong Witness Church of God and, in accordance with Ahnsahnghong's will, declared 1988 to be the end of the world, created and distributed leaflets, and went around Seoul calling out to citizens that 1988 was the end of the world.

Kim preached the doomsday from 1988 to 2012, and whenever he failed, he tried to cover up his ugly crimes by changing the name of his church or filing lawsuits against those who criticized him. When hundreds of members of the Church of God in Daegu left the church and criticized the fraudulent practices of the Church of God and Kim Joo-cheol, the church mobilized its members to assault the defectors, an incident that was covered by MBC News in Daegu for three days.

Kim also submitted a seminary degree certificate to the U.S. Embassy in order to obtain permanent residency in the U.S. According to the certificate, Kim entered Melchizedek Seminary in Jeon Eui-myeon, Chungcheongbuk-do, in 1980 and graduated in 1983. However, according to witnesses, there was no seminary at that time.

According to the Articles of Incorporation of the Church of God, Kim Joo-cheol has the supreme authority to run the church's finances, publish doctrines, and discipline members, and Jang Gil-ja has no authority. According to the Articles of Incorporation, Kim Joo-cheol is the permanent president, which is an absolute power that exceeds the Pope in Catholicism. Therefore, the supreme authority of the Church of God is Kim Joo-cheol, not Jang Gil-ja.

In addition to the end of the world, Kim teaches an evil doctrine that destroys the homes of his followers. He taught that earthly families were fake, that non-believers were demons, and that they were cursed if they did not tithe and evangelize, all of which made him a trillion-dollar fortune in Korean money. It also sued and lost lawsuits against its critics and was branded a cult. The Church of God is run by Kim Joo-cheol, and Jang Gil-jah is just an idol that Kim Joo-cheol built. Just as the idol itself is not powerful, but the person who set it up is powerful, so Kim Joo-cheol, who set up the idol of Jang Gil-jah, is the real owner of the Church of God. However, Church of God members are unaware of this fact.