Would Dexter have been convicted of being the Bay Harbor Butcher?
There definitely wasn't enough to convict him of Matt.
We've got the wheel marks and the fact that Dexter is from Miami, but that's about it. I can't recall what all Laguerta had for evidence, but Bautista definitely would bring that.
It feels like a bit of a stretch based on what we have from this show alone, I think it'd be tough to prove beyond a reasonable doubt.
This is assuming he didn't kill the Coach, of course.