Qatil Boxer

Tejas Yadav gets killed in the Boxing ring while fighting with his rival boxer Dharam Kumar. Lavanya bets on Dharam instead of his boyfriend Tejas in regards to the match. How did the metal plates enter Dharam Kumar's gloves? Who killed Tejas Yadav? Coach Ravindar or Tejas's girlfriend Lavanya? or Tejas's duplicate brother Arjun?