X is arrested and charged with the murder of a woman he had recently married. The victim was found dead in her bath. The investigating officer, a sergeant in the Namibian Police, tells X that the police are also investigating other murder cases against him and that he would possibly not be charged with the other murders if he confesses to the current charge against him. X goes ahead and confesses to the murder. Fully discuss or evaluate the admissibility of X's confession to the investigating officer.