The killer drives straight into a gravestone and shatters it with the front right side of his car, which at the very least would break the right front headlights. Yet a short time later when the car is abandoned there is no damage there at all.
When Theo is dancing with Irene in the flashback, he has white shoes.
When he climbs up to the crime scene, his shoes are black.
When he climbs up to the crime scene, his shoes are black.
Shooting one frame every four seconds for four hours gives you 3,600 frames played back at the standard twenty four frames per second would produce two and a half minutes of film.
The 3-piece suit with bell bottom pants was late 1970's menswear, not applicable to the flash-back to 1969. Kojak's suit would've been straight-legged and shorter hem, most likely without a vest and with a much less fitted jacket.
Suddenly, the detectives are walking around the squad room with empty holsters, unlike in prior seasons (and real life).