Spenser's quit by the police

[Spenser]

There are some starting points, why Spenser had quit the police and as a PI made independently.

novel:
Spenser wants no bureaucracy, all the paperwork and did not like to submit to a supervisor and was therefore terminated itself.

TV:
Based on the last episode of "Haunting": Spenser had in the very bitten so hard a case of abduction of the girl and also operates through its powers, that it the Boston PD had resigned.

So, but today I have a slightly different Ausgangssitiuation in the novel ""Small Vices" read, which in turn is slightly different (Read about it in the German paperback edition on page 46: This explains Spenser, that he has no "patience with the hierarchy had. "he was terminated shortly thereafter due to a case, the decision to make independently as a PI would have facilitated it.

This situation in turn very similar but the TV context: I wonder what really is true whether or not Parker himself knew exactly when he wrote "Small Vices" and he had also kept more to the TV situation.

What are your opinions / conjectures about this topic?