A video walkthrough for Phoenix Wright: Ace Attorney: Trials and Tribulations (also known as Phoenix Wright 3) for the Nintendo DS. Episode 5: Bridge to the Turnabout. Part 32 of 44.
In this part, Dahlia stops discussing how the plan was supposed to work, and she starts discussing how it actually happened. Dahlia was channeled by Misty Fey, and just as she was about to stab Maya, Dahlia herself was stabbed. Dahlia is pretty sure that Maya was the one who stabbed her.
The next thing Dahlia knew, she was locked inside the Sacred Cavern. She stayed there until switching places with Iris. This (along with a conveniently-timed phoned call) confirms that Maya is NOT inside the Sacred Cavern. Maya's complete disappearance from an isolated location leads to one conclusion: Maya must have committed suicide by jumping in Eagle River.