Jul 05 2009
Populating a Mystery
So you’re looking into planning a mystery, and you’ve already figured out what happened. Now it’s time to figure out who the people involved are. In general, the characters connected to a standard mystery come in three varieties: suspects, witnesses and experts. That doesn’t mean there isn’t overlap between the groups—I’ve seen characters who ranged from being one to being all three—but it does mean that any given character involved in the mystery should probably be in at least one such group.
Who are they?
Logically enough, the suspects are the ones who might have done it. They’re often a varied lot, but all of them will have one or more of three qualities: a motive, or reason to have committed the crime; skills by which they could have done so; and an opportunity to have done the deed. As with mystery character groups, a given suspect can have more than one, and in fact, the culprit is going to need all three. The more a character’s got, the more suspicious she is. Another consideration for suspects is how much the investigators (or the audience, if the two are discrete groups) want to suspect them; I find it useful to have an even balance between people they’d rather not believe did it and people they have no problem whatsoever suspecting.
Witnesses, on the other hand, are observers. Most of us, when we think of witnesses, think of people who were at the scene of the crime and noticed something there, but there are other options. You have the ones who were somewhere else entirely but saw the suspects there, creating an alibi. Or overheard a plot, or saw someone doing something that might have been preparing for the crime, or—well, you get the idea. And not all of them are going to be telling the truth; they might have a bone to pick with one of the suspects, or someone else to cover up, or just want the notoriety that comes from Knowing Something About the Case, and the investigators will need to figure that out before they can solve the mystery.
Contrast the experts. While a witness is characterized by knowledge of things related the case, the expert is characterized by knowledge or skill that can advance the investigation. The lady who can get you to the scene is an expert; so is the forensic specialist, the jewelry appraiser, the hacker, the rival detective: basically, if they’re going to be sought after for their skills, or if their knowledge is useful regardless of how much they know about this particular case, you’re probably looking at an expert rather than a witness.
Combinations of the above are just as much fun. The most common overlap is between suspects and witnesses; after all, anyone who was present at the right time to say what happened probably had the opportunity to do it themselves, right? A witness-expert might know something about the case relating to one or more of her areas of expertise, but her witness knowledge might have nothing whatsoever to do with what she does as an expert. Suspect-experts are walking complications: on the one hand, their skills might be necessary for a certain phase in the investigation, but do you really want to deal with the risk that you’re giving away details of the investigation to the culprit?
Once you’ve figured out who these people are, you’ll want to figure out how to introduce them. If the characters already know one or more of the secondaries, so much the better; if not, you’ll want to figure out at least two or three ways to get anyone important to the mystery onto the scene or into the clue list. Players can be oblivious, after all, and even a character in a novel might miss the first tip-off that a character could be relevant.
But once they’re in, they’re in, and you can move on to the next step.




