logical
The comment is by Bran muffin.
@branmuffin Back in May or June I posted a couple of links to information regarding the geological makeup of Colorado around Maysville. Plus a guide to all the abandoned mines in the area. I don't think BM is a criminal mastermind but one thing I do think he knows well is rocks. Boulders, granite, shale, gravel, etc. And I would imagine he knows where deposits of them are and how easy it would be to cover a dead body, or parts thereof, with rocks.
I keep coming back to that image of BM that TD mentioned where he was bare chested, soaking wet and cold looking the day before the videotape of BM explaining what happened to the bike. According to TD he appeared as if he'd been in the creek or the river and he walked up to his truck and sat in it with his chest against the steering wheel then he drove slowly away. I was looking at what was around there on the other side of the creek/river.
There is an old unused mine called Copper King mine just on the other side of the Arkansas River just a bit south and east of the Morphew home. I wonder whether he placed SM somewhere near that mine or under a wash of stones. Or parts of her.
I have no real idea how SM was killed. Initially, I thought it would be a bloodless murder like a strangling, drowning or suffocation, since I believed it was premeditated and that blood evidence would have been discovered during the search of the Morphew home in late May. But now we know about the abrupt end to the social media messaging between SM and her friend, I'm not so sure. It could be they got in an argument that escalated and she just got disgusted with the whole thing and put her phone down an walked away. And he followed her.
But BM being seen soaking wet and cold makes me think he was ensuring that something he had hidden was still hidden.
I also wondered whether the building site was dug up because cadaver dogs got a hit under the cement and even though it appeared they had no physical evidence in terms of bone fragments, etc I wondered if soil samples provided evidence of a dead body. JMO MOO