The police investigation was met with a wall of silence.

【wall】警方的调查遭遇沉默的坚冰。

The screams sounded sharply over the roofs with a power that seemed to have no relation to the ordinary strength of a man's voice. These fierce cries rang against walls of silence.

喊声在屋顶上空环绕，简直让人无法相信是人发出的声音。那凶恶的叫喊在寂静的墙壁回荡。