Complex sentence: Most of the agents escaped New Zealand, but two, Captain Dominique Prieur and Commander Alain Mafart--posing as married couple Sophie and Alain Turenge and having Swiss passports--were identified as possible suspects with the help of a Neighborhood Watch group, and were arrested.
Split into simpler sentences: Most of the agents on the team escaped New Zealand, but two, Captain Dominique Prieur and Commander Alain Mafart were identified as possible suspects. Posing as a married couple, Sophie and Alain Turenge, were identified with the help of a Neighborhood Watch group, and were arrested.