One of the most important thing in a film is the character development. Without strong characters, the film has no chance of being great. Characters also need to be able to interact with others and create some sort of relationship (not in a romantic way, more like a bond).
Some steps to developing a character and their relationships are:
1. Make them stop and think.
"Introspection (the examination or observation of one's own mental and emotional processes) is the easiest and clearest way to develop your characters’ relationships."
2. Give them strong opinions "Every narrator has a personality. Let that narrator’s opinions inform her character. And by all means, let characters gossip among themselves"
3. Play a game of risk.
"Make one character sacrifice or risk something for another."
4. Leverage the group.
"The relationships between individuals in a group—whether a clique of three or an organization of thousands—are endlessly varied, shifting and fascinating."
5. Befriend ambiguity. "Resist the urge to over explain relationships. Everybody instinctively understands there’s more than meets the eye. In every adult, there’s a bit of a child. In every cop, there’s a bit of a criminal. In every sadist, there’s a bit of a masochist. And in every human, there’s a bit of a beast—and a bit of a god. Use that knowledge to your advantage."
6. Tap into the power of a grudge.
"Create a character with a sensitive spirit, and make him suffer injustices that would make anyone’s stomach shrivel."
7. Don’t overlook everyday interactions.
"Let your characters approach others, glance off them, then continue on different trajectories. When crafting your characters’ relationships, let the yin-yang symbol be your guide. You’ve seen this circle made of equal parts black and white, with a drop of each color in the other. No relationships are clear-cut, nor are any one-sided. Leaven the love with a little fear, or maybe even hate."
These steps will help my group and I develop the a strong relationship between the "criminal" (quotations are used because he really isn't a criminal, he is being misjudged) and the cop and help develop our story even better. I see the "criminal" as a strong, sassy, and hurt individual and the cop as a judgmental know-it-all.
Now let us all hope and pray we find the right actors for this so we can pull this off.