No, this is not a binary choice. Planting of evidence does not require a massive conspiracy. All it takes is one person, not even necessarily a cop. And in fact, it didn't even have to happen during those 27 hours, it could have been planted before.
Still, I think the burden is on the defense to present their case for tampering. I'll admit I was skeptical at first. But the whole Google map thing just doesn't fit, there was always something suspicious about it.
With respect to Calgary123 and oenophile, I had a different take on it.
1) I don't think any of this was the result of a conspiracy. I think there were a series of mistakes that were deemed negligible that weren't. I also think there was a cover-up of the mistakes.
2) I do believe that Google map without a google expert on the stand couched behind a position of national security is worthless. I could not have put any stock in it as a juror, judge or attorney. It was theatrics.
3) There were some bizarre pre-trial gymnastics in this case that bordered not on giving an appeal of the results but pitching the whole thing from the problems this caused. The court, the prosecution and the defense all openly acknowledged that evidence was being withheld past the time-limits of third party scrutiny.
4) The prosecution was deliberately misleading a judge. In any court room, this should be a problem. For some reason, it was overlooked and nearly rewarded.
I was (kind of am) on the fence about what transpired. I had trouble looking at it from the perspective of manslaughter or 2nd degree murder because of the google map and the allegations of a spoofed phone call. I didn't feel it was a first degree murder case as much as it might of been a moment of anger and a bizarre coverup by the perp (from the BC did it side of my brain) and I didn't feel the prosecution was being honest. The things they said early on to throw off the defense were awful. I remember hearing (in court) the DNA evidence conversation between HK and HC and being baffled that they weren't sharing that information in a truthful fashion.
I also sat through arguments here and in person with folks about other crimes that were never solved that felt similar. Most of those have been knifings. But, there were a few strangulations, and the cold case guy deep in my brain won't let that go.
All in all, it was just awful execution of a terrible idea born of tragic circumstances.