Maggie only snuck into the afterparty to retrieve her toy koala bear that Brett (Ike Barinholtz) took from her, but also decided to draw on Aniq's face.
After Maggie's story is done, Danner (Tiffany Haddish) gathers the guests in the main living room to reveal who killed Xavier (Dave Franco).
She seemingly reveals to the group that Brett is the murderer, but Aniq (Sam Richardson) quickly steps in to defend him, despite this meaning that he would be the only other suspect left.
However, Danner reveals her accusation of Brett was false: both a test for Aniq's character, and so she could confirm that he wasn't an accomplice to the true murderer: Yasper (Ben Schwartz).
Doing so also gave Miller the idea to present each version of the event as a separate genre in line with the respective POV's of each witness, called "mind-movies" in the series itself.
Mary Littlejohn of TV Fanatic called the episode "a satisfying conclusion to a meticulously planned, incredibly entertaining series", in particular praising Everly Carganilla's performance as being "as adorable as child actors get [with her] line delivery [being] spot-on".
Each character attends the reunion for a specific reason, typically to get another shot in terms of where they felt they fell short in life, try to get revenge for past conflicts, or prove how far they have come since their youth.
The Afterparty's season 1 ending recalls how integral one’s high school years are to their future life and how easy it can be to revert to a youthful state of mind at a reunion.
After 15 years, The Afterparty's characters, like Ike Barinholtz's Brett, are confronted head-on with their successes and failures, with such an event being a catalyst for these figures to bring out the worst and best in themselves.