So long as they can close the case, they really don’t care.
Maybe they can get the killer to plea bargain testimony to some unsolved crimes.
[So long as they can close the case, they really don’t care.]
I doubt anyone is that immoral. More likely - they get tunnel vision. Unless hi def crime scene video is available, all police investigations involve an attempt to reconstruct what actually happened. Some officials go on hunches as a matter of habit, and these hunches, supported by evidence that materializes as they pursue these lines of inquiry, may even help clear a great # of cases. This may lead them to push that button, under force of habit, even where the evidence just doesn’t stand up under scrutiny. Because it worked for them in the past.