Focusing on your last point, I totally agree, I don’t think the Broomfield alibi was part of his initial plan, if he even had one.
You don’t rush to throw together a job like that at the last minute on Mother’s Day. You already have it organized, with all your ducks in a row.
This seemed to have been done in a frenzy, and he merely took advantage of a job that he did in fact have to perform at some point.
This all looks suspicious on its face, but I think we’re going to learn things that make it absolutely damning.
And that’s just one piece of this whole thing.