Murder Mystery Harry Potter RPG plot

From WikiPedia:
A lesser known variant (known as DB Murder Mystery Parties) have 15 to 25 detailed characters as part of the plot. Each character receives their own character profile which includes their background information, the information they know surrounding the murder(s), exactly what they were doing and what they saw the night of the murder(s), and private information about themselves and the people they have been in contact with. Each participant receives their information a week or two prior to the evening of the murder mystery party, which allows each person time to get into character, get to know other characters, and develop their theories and alliances. The day of the party the participants come together to discuss the murder(s) that have occurred. At that time the court is in session and the town decides who to accuse, who to believe, and who to hang (similar to the game mafia). Murders can also occur the night of the party. When the town believes that the murderer(s) have seen justice the court is out of session and the town will find out the truth; have the murder(s) been hung, have the guilty been set free, and/or have they condemned innocent townspeople to death. This variant allows each character to be in complete control of their own fate, attempting to make the experience as close to real life as possible. This variant is great for groups of people who see each other throughout the week, such as work groups, church groups, college students, neighborhood groups, etc.