I like how in Case 9 of PB, a head takes three hours longer than the body.
Really, it's just game mechanics. IRL this would take less time.
I real life, you also don't have only 5 suspects, and "killer's profiles" have secondary importance, and there is no "Sargeant Honeyrulz"
To proceed to next case, you need 36 or 35 stars?
In total, you need 36. If 36 are finished in additional, then no starts for next case