[AppyPappy]

How do they refute the blood evidence and the handprint in the motor home?

By putting reasonable doubt into the jury's head. You can only do that by refuting the evidence. All Westerfield has to say is "I have no idea how it got there" and the jury will weigh that.

[luvbach1]

Westerfield saying "I have no idea how it got there" in no way refutes the blood and other physical evidence in my mind.I don't think that will convince the jury either.I had in mind an explanation for its presence, for which the staement above would not at all suffice.