Complex sentence: When the police demanded that the treasure should be taken to the local police station, Kitov refused and the both groups spent a whole night outside the mound until the police escorted the team and the artifacts to their hotel the next morning.
Split into simpler sentences: When the police demanded that the treasure be taken to the local police station, Kitov refused. Both groups spent the whole night outside the mound until the police escorted the team and the artifacts to their hotel the next morning.