Dead Boxer

Famous boxer Vali collapses and dies during a fight against Toren. Initially people thought Vali had just gotten knocked out, but when he doesn't wake up, his coach gets alarmed and calls for the doctor. The doctor pronounces him dead on arrival. CID is called in to investigate this mysterious Murder. Wali's coach is convinced that Toren is the one who killed Wali. Was it an accident or was he murdered?