Spot the Pineapple: there is a pineapple in the fruit bowl.
When Lassiter calls for backup, the whining voice at the police radio is Kimmy Robertson's voice. Kimmy played Lucy the receptionist and answered the phone of the police station in Twin Peaks (2017).
Shawn tells Lassie, "Good Luck. We're all counting on you." This is in reference to Leslie Nielsen's character Dr Rumack saying the same thing to Ted Striker and Elaine Dickinson in the cockpit in Airplane! (1980)
Lassiter says his middle name is Jebediah.
Lassiter's speech emphasizes his willingness to die in a "hailstorm of bullets" and is referenced a couple times in the rest of the episode. In a 2005 episode of Criminal Minds (L.D.S.K. (2005)), Timothy Omundson plays a serial killer who's profile included that his "plan [was] to go down in a hail of bullets."