Corroded Testimony

This is an old case from the 1990s. Lin Xiaoyue, a textile mill worker, was murdered in an abandoned factory.

There was a wealth of evidence at the scene, including a four-hole button.

Chen Xu, the newly appointed captain of the criminal investigation team, made the case a priority when the old investigation was reopened.

He never expected that bringing an old case back to light would meet with such fierce resistance.

What could have happened to make everyone involved so reluctant to talk?