It is mentioned that Officer Snyder is from Stockton, California as is the suspect that shot him. This is a rare glimpse of the personal lives of one of the show's character the series rarely reveals.
Officer Snyder, portrayed by William Wellman Jr., and the shooting suspect in the basement garage both turn out to be from Stockton, California. Located in central California about 70 miles east of the Oakland/San Francisco area, Stockton had a population around 110,000 in 1972 (population estimated at 312,000 in the year 2019).
Malloy tells Reed "There's a Greenie for you" prior to making the stop on the unsafe passing. The top page of the citations used is a green color paper thus giving the nickname of "Greenies" to citations.
Code 30 = burglar alarm. Subcodes for 30 are 30 Silent or 30 Ringer, neither which are used in this instance.
There is a character named Floyd Sinclair. Series creator Jack Webb used that same character name, played by a different actor, in another of his shows, The Fur Job (1967) of Dragnet 1967 (1967).