Seriously, the most FUN Murder Mystery Party Kit we have ever played! And gorgeous designs, too! This would be a FUN Halloween party!
Turn mealtime into a Murder Mystery Dinner: Mystery Party Printables - free printables for creating your own mystery party (family-friendly)
Kids' Mystery Party: Games and Ideas for a Kid-Friendly Murder Mystery Party - Birthday Party Games
For a gatsby/murder mystery
How to host a murder mystery party by Dr. Bon Blossman of My Mystery Party at http://www.mymysteryparty.com
Amazing Nancy Drew Mystery Party by The Party Teacher - the guests solve the mystery of the purloined party favors!