Complex sentence: She and the police officer arrive at the hotel, and Nicole pretends to pack her belongings, but instead sneaks out through the hotel's back door, and puts a handkerchief into the police car's exhaust pipe.
Split into simpler sentences: She and the police officer arrive at the hotel, and Nicole pretends to pack her belongings. She sneaks out through the hotel's back door, and puts a handkerchief in the police car's exhaust pipe.