A fourth suspect in the killing of American marine biologist Kent Carpenter has surrendered to the police, according to a report by the Negros Oriental Provincial Police Office.The suspect, who served as the lookout during the crime, is now in custody after undergoing inquest proceedings.Police have arrested three other suspects, while one remains at large.Authorities are actively searching for an alias 'Eden,' as reported by Super Radyo dzBB.

The incident has sparked public outrage and tributes from environmental groups and academic institutions, highlighting Carpenter's significant contributions to marine biodiversity research.Carpenter, a renowned marine biologist, was shot dead in his home in Sibulan, Negros Oriental on July 12.

His work, including identifying the Verde Island Passage as the 'Center of the Center' of marine shore-fish biodiversity, played a crucial role in supporting the Philippines' arbitral win in the South China Sea dispute.The police are currently gathering statements from the apprehended suspects to build a comprehensive case.The killing has intensified calls for justice and underscored the importance of protecting environmental scientists.

The ongoing investigation continues to seek the remaining suspect, with authorities emphasizing the need for public cooperation in locating 'Eden.'