[Spoiler] "Less Than Evil" Is Lee Seol the Real Killer?

On the latest episode of the MBC drama "Less Than Evil", Woo Tae-seok (Shin Ha-kyun) and Eun Seon-jae (Lee Seol) investigated the death of her foster parents. She had asked for the killer to be found.

However, the more they discovered about the killer, the stranger it became. Eun Seon-jae was suspected as the killer because she was caught on CCTV purchasing the weapon that killed her foster parents. Eun Seon-jae had also told Woo Tae-seok, "If you find out why my foster parents had to die, you will experience pain like no other".

However, it was impossible that she committed this crime in just 3 minutes alone. She must have had an accomplice. Woo Tae-seok suspected Seo Jae-geun (Kim Ki-cheon) who worked in the same factory as Eun Seon-jae's father. He was the only other one who took care of her.

At the end of the episode, Seo Jae-geun appeared at the police station. He said, "I've come to surrender. I killed Eun Hong-goo and Park Jeong-sook". He was terminally ill.