In Korea, all investigations of maritime crime such as murder, robbery, drug trafficking, and illegal fishing that have been committed at sea are under the jurisdiction of maritime police. As maritime crimes tend to have more unique cases, cause damage on a larger scale, and be limited to evidence that is possibly contaminated, compared to non-maritime crimes, the cases demand maritime police investigators with a higher level of expertise. However, there is currently a lack of competent investigators in the maritime police, leading to the training of maritime police investigators in training agencies. so many of maritime investigators goes to land police training agency including Korean Police Investigation Academy. Therefore, in order to improve the capabilities of maritime crime investigation we must first gather information and data in relation to maritime crimes to foster more investigation specialists, and establish specialized training agencies offering a training course more focused on maritime crimes.