Why did you kill Kim in the movie Door Lock?

Because Jin Ji is harassing and trying to kill the hostess, Han Dongxun thinks it will affect his plan.

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Jin became a suspect because he had entangled Jingmin before and had Jingmin's business card. In the police investigation, Kim once followed Jingmin. Kim replied that he wanted to kill Jingmin and the section chief because of anger. At this point, the police officer is basically sure that Kim killed Jiang.

I always thought Ginger was the real killer. Now that I have been arrested, Jingmin's heart has fallen to the ground. However, as soon as I entered the room, I received a phone call from police officer Li, saying that I should not go out anyway, because the DNA did not match, and Jin Ji had been released. However, what I didn't expect was that Jin Ji was killed.

The murderer's ending:

Officer Li also found that Han Dongxun was suspected in this matter, so he drove to the hotel and was killed by Han Dongxun without a few tossing. It is said that this is also the urine of Korean movies, and it always needs a weak female host to kill the abnormal killer. After a life-and-death struggle, Jingmin killed Han Dongxun and was finally acquitted by the court for self-defense.