Not directed at you Cyber...but I’m curious as to how one get’s a second passport? Dang if it wasn’t hard enough (as in time consuming and expensive) to get one.
Declare the first one lost or stolen. That gets the first one "canceled" in the database, so it becomes useless for border crossing. The person declaring a lost or stolen passport also agrees to submit the lost one, if found (or recovered one, if stolen) to the government. The submission may be accompanied by a request to cancel the lost one (punch a mess of holes in it), otherwise the government destroys the "found/recovered" one.
You have a passport. One day you need it for something and whoa! It’s “lost.” You apply for (and receive) a replacement, and there you are: Two passports. Now, the new one declares the old one void. But there is no way the old one can note that.
GZ was required, as a normal part of a bail, to surrender his passport. It is alleged he had found the “old” one and surrendered it, while he held the “new” one. That is a big-time no-no. It indicates a willingness to flee.