When can I use the PICK ability?

The PICK ability, allows you to discard a specific crew member from your hand to search your deck for an armor card created by that crew member. Currently, only three cards have the ability:

Trace Law

Segheo 

Maxine Trinidad (crew)

A player may show and play a PICK ability at anytime to search their deck and find a qualifying armor, show it to the opponent(s) and then shuffle their deck. If a player uses a PICK ability and they do not have a qualifying armor (or decides not to select an armor) then the player takes no cards and shuffles their deck, with the crew member card still being discarded.