no, they're looking for the one using the remote control, fukubei say he saw, then radio, kenji was nearest so he went up and saw the commotion and fukubei fell down with the mask guy.
then kenji went down the building but never verify the body.
then they thought since the remote has dropped, and its still moving, they decide to attack the robot instead. so they gather up at the van and kenji went up cos otcho fell down iirc.
ah... so desu ga!