A police officer's alleged attempt to conceal and destroy evidence in the murder case involving a fellow officer's son has sparked public outrage. On Wednesday, police arrested an unnamed detective in the homicide division of Gwangsan Police Station in the southwestern city of Gwangju on charges of colluding with a senior inspector, identified only by his surname Jang, to destroy evidence related to allegations of Jang's son's involvement in the premeditated murder of a high school girl. The alleged collusion came to light while the murder investigation was still underway. The case has since been transferred to prosecutors for review. The incident has fueled a heated debate over a proposal to overhaul Korea's criminal justice system by stripping prosecutors of their authority to direct and oversee police investigations. Under the proposal, the police would assume full responsibility for criminal investigations, while prosecutors would be limited largely to deciding whether to indict cases referred to them. The ruling Democratic Party of Korea (DPK) has submitted an amendment to the Crimi