According to Sonny Bonds' Personnel file in the station computer, his date of birth is 6/30/58, but according to his Personnel file in the former game Police Quest II: The Vengeance (1988), his date of birth is 10/30/52.
According to Homicide file no. 199144 in the station computer, Marie Bonds' date of birth is 3/15/55, but in the game manual (the notes section) it is handwritten "4/20 Marie's birthday". In the former game Police Quest II: The Vengeance (1988), Marie's Vice record indicates that her date of birth is 2/14/53.
Jessie Bains' first name is misspelled "Jesse" in Michael Bains' military record.
If Sonny is killed by Steve Rocklin, the death message ends with "The last thing you here is the suspect's laughter" - instead of "hear".
If Sonny leaves Aspen Falls without arresting the lunatic, the death message starts with "Your failure to secure the derranged man..." - instead of "deranged".
Looking around outside the Coroner's Office will open a narration text indicating it's an ordinary "summer afternoon in Lytton", but the case data establishes the game's events in late March, which is spring, in the United States.
In the beginning of the game, Sonny is notified by the dispatch "we need you to drive out to Aspen Falls to respond to a call" (when Sonny gets there, it turns to be a lunatic who scares other people). The dispatch should have been more specific about the call, and to use the relevant police code.
Murder victim Andrew Dent is 56 years old, according to his case file, but the actor portraying him clearly looks much younger.
A bug in the game makes it impossible to score the maximum 460 points, but only 450 at most.
The Assistant District Attorney asks Sonny on direct examination if he cited Juan Ruiz for impeding traffic on September 14th, which Sonny confirms. However, when Sonny issued the parking ticket, it was dated March 30th, 1991.