Cadaver dogs have been discussed. I know they're trained to smell cadaverine and putrescine which is why they can sniff out really old remains but how accurate are they for a freshly deceased body?
I would think if a person was killed in a crime of passion, under normal circumstances (family members coming and going, close neighbours, deceased had a job where they'd be missing, etc) the killer would make all kinds of mistakes in their haste to remove a body. Like removing a carpet or a missing shower curtain, bleach being used liberally in the home, cushions and bedding gone, a strange scene to suggest a home invasion. But does the time spent frantically trying to cover a murder, even if it's only hours, mean that cadaver dogs can detect the smell of a dead body?
But what if the killer didn't have any of those circumstances: no family members coming or going, no close neighbours, deceased didn't have a job to be missing from. In a crime of passion, they'd still have a means to dispose of a body without rushing and to create a narrative that on the surface would pass the smell test. But would it pass the smell test of cadaver dogs.
If it was a planned murder they could finesse the details ahead of time. Removing a body within minutes of the event. A body could be placed in the back of a truck and covered with three yards of soil and dumped somewhere. If more soil was delivered to a subsequent job site, would the residual scent of a dead body be picked up by cadaver dogs?
Is it possible that Barry went to Denver but with a big detour before he arrived? A detour that involved getting rid of a body. We don't even know what time he left Maysville. We only have his word about that strange conversation between him and Suzanne on Mother's Day about him going to Denver on Mother's Day. He really only has to prove that he was in Denver. If the client was at home they could verify his attendance, even if he said he was only scoping the site to advise the workers. Just a quick pop in, pop out. Alibi set.
If SM is still located somewhere in the general area, I agree the bike is a red herring, placed to create a scenario to suggest a tragic accident. If spring run off was high he may have created a scene of an accident where SM got hit, flew over the barrier into the ravine and tumbled into the creek/river and got carried downstream. If LE didn't seem to consider that a viable event then maybe the mountain lion became scenario #2. When that didn't seem to sway LE then came the idea she was abducted. Why else would he offer a 200K reward, no questions asked?
I hope LE isn't hoping for him to break because I don't see it.
I really wonder if Suzanne will ever be found. Poor woman. Poor girls.