Who could be legally responsible if a missing original will is mishandled?

For the issue described here, probate courts usually prefer the original signed will, but a lost or missing original does not always mean the estate must be treated as intestate. For the issue described here, state law may provide a procedure for proving a copy, locating a deposited will, compelling a person to produce the original, or presenting evidence about why the original cannot be found. The burden and presumptions can differ substantially by state.