Yes. We think we should subpoena the CPD to produce his service records.

我们认为 应令芝加哥警方提供他的工作。

Next I'll draw a line from P down to B, and then  from P down to C, and I claim that this triangle here is congruent to its reflection across that  perpendicular bisector, which will be CPD.

接来，我将画一条 P 到 B，然后 P 到 C 的线， 我声称这里的这个三角形与其在垂直平分线上的反射全等，这就是 CPD。