Kissa Daya Aur Nanhe Detectives Ka

A group of children are playing outside their colony at night and they decide to enter an abandoned house, just then they witness a man killing someone. They tell Daya about the incident, but when he searches the abandoned house he finds nothing suspicious. The next day, one of the kids and his mother goes missing. Could their disappearance be related to the murder that the kids witnessed or could it be a prank they are playing on CID?