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One shot RPG called Murder at a Circus:

1 investigator who is defined by the series this is an episode of
1 strong man
1 clown
1 acrobat
"Bonus Roles" (sheriff, ringmaster, elephant trainer)

There is always a murder, players draw lots and spend the whole game inventing details

Each scene the next player (by turn order) can invent a clue, and then has to convince the investigator that their clue is true. At the end of the scene the investigator says if the clue is real or not.

Catch: The Murderer is always lying

At the end, the Investigator explains how the death happened, using only clues they accepted.
Then the murderer shows which clues were false. Then if the Investigator can still rebuild their story with those clues being false (rest of table arbitrates) they solve the murder.
silverwizard friendica (via Twitter)
Each scene the next player (by turn order) can invent a clue, and then has to convince the investigator that their clue is true. At the end of the scene the investigator says if the clue is real or not.

Catch: The Murderer is always lying