These wings share a similar shape due to a process known as convergent evolution. The wings, in this case, are analogous structures that developed independently from one another (aka they do not share a recent common ancestor), but the organisms adapted to a common environment. Simply put, their similar problems lead to similar solutions.
Explanation: Because it is not correct, usually, evidence that is able to be taken, is then stored away in a so called box. It is also there for the court to use, but I’m quite certain they don’t throw the evidence away.