Each party needs a pooper.

Only Murders can be found in a Building July 18 episode takes viewers on a trip through time when Alice (Cara DelevingneMabel’s hosts an event for )Selena Gomez) apartment. OliverMartin ShortTo get some laughter, he suggests that they play a game of Son of Sam. It is a game in which the player refers to a fictional character. David BerkowitzThe ’70s’ killing spree.

Oliver, however, has other motives. Flashbacks explain that Oliver has ulterior motives. The game allows him to detect if someone is lying by allowing him to see their tell such as nervous glances or twirling hair. 

Then, there’s the Only Murders are allowed in the Building writers, Son of Sam was their way of explaining Oliver’s interest in crime solving. You are the creator John Hoffman told CelebHomes News, “It’s pretty clear with Mabel and Charles (Steve Martin) in certain ways,” but what spurred Oliver’s inquisitive nature?