A police detective is talking to the victim of a robbery...
“We really need your help!”
“What do you need me to do?”
“Come down to the station first thing in the morning and we will explain everything then.”
“O.K. I'll see you in the morning.”
A restless night passes...
“I'm here. Now what do you need me to do?”
“We need you to identify the robber from a lineup. The glass in between us is one-way glass. You can look at him but he can't see you.”
They bring in the lineup...
“That's him! Third man from the left!”