Write a story that illustrate the saying only a fool does not change his mind

A fool who doesnt change his mind:

Henry walked in. "Noo stop." yelled from behind Martin. Henry kept walking forward and entered the room. " What are you doing here? hey get him out of here. this is serious business."  Said a fat man gathered around a table with suspicious things in a bag, joining him was a tall skinny guy with glasses, a side scarred middle aged man, and a man in a black trench coat and hat but he wasn't seen he was facing them. "I am not an officer but, you seem to be doing some illegal stuff come on turn yourself in, its the right thing." Replied Henry. The group busted out into laughter. "You have 5 seconds son if you dont leave, you will have to stay but we cant promise you will still be alive." Said the skinny man. Martin was outside he wanted to help but he wasnt a fool he wasnt going to barge in such a dangerous situation. "Come on gu-" BANG .. " Alright back to business, Jerry clean that up we dont have time to be wasting here." Martin peered in through the small glass window. Henry was gone. If only he had listened. Martin ran out and went to a local police station and told the police about what had just occured. 

The error in the sentence is a dangling modifier