Walden Media has acquired the film rights to "Where in the World is Carmen Sandiego?" from Houghton Mifflin and is developing the property as a vehicle for Jennifer Lopez to produce and star in. When the ACME agency's greatest detective Carmen Sandiego becomes the world's greatest thief, it's up to her former partner to follow her clues and track her down. Their cat-and-mouse game leads the partner to confront a greater mystery: Is Carmen really a thief or a hero? The property originated as an educational computer game before it was turned into an animated TV series.