Erstwhile

The neighborhood Thanksgiving party was going pretty well until you keeled over and died.

Now you're a ghost, and you're going to figure out who killed you. But you can't exactly interview people or search for clues when you're dead, can you? All you can do is piece together memories about what happened.

No one said the memories had to be yours.

Erstwhileis written by myself (under an old name) and Marijke Perry. It placed 5th in IFComp 2018 and won Best Individual Puzzle in the 2018 XYZZY awards.