The thesis conducts a literature review to study two recent airplane crash incidences associated with the China and Singapore Airlines, describing how the two incidences were handled respectively as well as comparing the advantages and weaknesses of the response measures taken by governmental agencies in the two accidents. In addition, taking the incidences of the China and Singapore Airlines as examples, the thesis also examines the performance and roles of the local police department within the context of the two specific accidents. Finally, the thesis points out the direction and paths for future improvements of police emergency system.