None of the pictures even look like they were taken by private investigators though. It looks they were taken up front Taesu. Which is why that segment is weird to me. He should know when and where they were taken, and they were most likely provided by his own mom.
the sigh of relief i let out when Junghyuk revealed that the photos were from Taesu’s mom and not a hired investigator ( ̄∇ ̄")