But this is just shitty policing. It's not a legal cause of action.
When you effectively plant evidence, its not longer just bad policing.
Its one thing to not do the legwork and not catch anyone, but rather than not catch somone but frame them by
1) using false forensic evidence -the hair
2) getting a snitch to make up a story
3) Sharing information with witness so they tell the right story to convict
4) Coaching witness for the right info
5) Over turning an innocent verdict and ignoring double jeopardy because you know hes quilty (how this happened I have no idea, this is bad judiciary)
6) Picking ridiculous evidence as relevant to pin it on your guy. Morin did it because he listened to classical music? Sure ok, lets investigate just him, but ignore all evidence from then on because you have your guy? This is more to your point - was it so incompetent as to criminal akin to
Criminal negligence
219 (1) Every one is criminally negligent who
(a) in doing anything, or (b) in omitting to do anything that it is his duty to do,
shows wanton or reckless disregard for the lives or safety of other persons.
Definition of “duty”
(2) For the purposes of this section, “duty” means a duty imposed by law.
R.S., c. C-34, s. 202.
Certainly if a doctor decided since you listened to classical music you needed to have surgery to look for cancer and you lost a leg - or even if you where in hospital for 4 years as a result of the surgery they would be in the criminal part.
And even if you argue that none of these things where worthy of legal punishment they all deserve removal from the police force, not promotions.
One could argue that each member of the team only made minor mistakes it was only as a group (which is not chargeable) that they become crinimal (as in the forensics, which where bad but how were the average detective to know that) but teams are supposed to compensate for there other members weaknesses - I need an editor for example - but if you don't compensate and its literally life and death you deserve to be fired.