Random Riddle: Finding The Criminal

A headman in a village got a report that there had been a robbery. He knew it was a male that was the criminal, so e rounded up all men in the town.

In a dark hut he had put a donkey, he told the men to pull the donkeys tail, he told the men it was a magic donkey and it would only scream when the guilty man pulled the tail, one after the other the men exited the hut.

When all men had passed through the hut they were confused, because the donkey still hadn’t screamed. The headman asked the men to show their hands and that’s when he had found the guilty man

How did he find the criminal?
 

Random Riddle: Finding The Criminal