Al otro lado de la ley

I think the judge sums it up, because of PC Strange's behaviour, all other police will have to work ten times harder to compensate.

True words, but alas the film tends to trivialise the events leading up to P C Strange's planting of evidence on "known" criminals. We see him being dragged into trouble by way of jail bait Susan George, who gets her kit off in a pretty unerotic way during the film.

Nowadays the main crime would not have been the planting of evidence so much as the statutory rape.

A better motivation for planting evidence would be the sheer frustration of seeing career criminals getting away with crime time and again. It would be more interesting than the plot actually used in this film.