Channel A's 'Detectives' Trade Secret' reveals the identity of a man who posed as a driver at city bus depots, along with his shocking family history.

The man wore a bus uniform and visited multiple depots, impersonating a bus driver. According to the production team, which tracked the case based on tips from citizens, he committed various offenses by disguising himself as a bus driver, including dining at restaurants and riding buses without paying. He was caught stealing cash from a fare box on another company's bus, and at some depots, he pretended to be a trainee driver and operated a bus, nearly causing a major accident.

The detective team investigated the impersonator's movements based on testimony from bus drivers. During the process, it was revealed that the man had contacted a convenience store part-time worker. He introduced himself as a bus driver and falsely offered employment, saying he would hire the worker as a driver if they obtained a large vehicle license. After building a relationship, he repeatedly asked for money and cut off contact when refused.

While continuing their investigation at the apartment complex believed to be the impersonator's residence, a neighbor testified that he lived with his grandmother. When the detective team met the grandmother in person, she burst into tears at questions about her grandson and shared her story.

Seeing this, Kim Poong expressed outrage, saying, 'He shouldn't do that to the grandmother who raised him.' The impersonator's parents also revealed, 'We also reported our son to the police.' As his actions — which even his family found difficult to handle — came to light, Kim Poong voiced concern, saying, 'This is far too serious,' and Defconn warned, 'If left as is, it is highly likely to escalate into a serious crime.'

In this episode, singer Yuk Joong-wan participates as a guest detective. Having recently moved to Mokdong for his children's education, he joked about the area: 'There's a lot of flat land and many parks, so my wife and child are satisfied, but I feel like I'm living in a different world. I'm the only one in Mokdong who gets drunk.' He also shared an anecdote about drinking with his younger brother, who is a musician, from the morning and falling into a flower bed when it was time for the children to come home from school.

This episode airs on Channel A's 'Detectives' Trade Secret' on August 10 at 10 p.m.