Complex sentence: In the spring of 2004, the airport was at the center of scandal when its recently-retired manager Marion Richardson and other current and former employees were investigated for suspicion of misappropriation of airport property.
Split into simpler sentences: In the spring of 2004, the airport was at the center of a scandal. At the time, its recently-retired manager Marion Richardson and other current and former employees were investigated for suspicion of misappropriation of airport property.