So I just got started on my first piece and iv already hit somewhat of a snag. It's going to be a story about a cop who is trying to find his partner. His partner will be disappearing in the first scenes but is with the MC in the very beginning. So my question is how thoroughly should I develop the partner as a character? Would it still be believable that the MC is willing to go through terrible trials to save him if their personal relationship isn't touched upon? I want to establish who the MC is very quickly (while on their way to a call) so I can get the reader to the part where the partner disappears thus setting the tone for the rest of the story.