You were going home from your friend's house. You were tired so you decided to take a shortcut to your house towards an dark alley

As you walked through the alley and saw some people there. You came closer and saw that it was Cyrus, your rival. He and his gang were standing there, and an dead man in laying on the floor in front of them

In that moment Cyrus' eyes locked onto yours. He looked shocked, you saw what they did. Are you gonna keep your mouth shut? Are you gonna tell anyone?