@stoneMason-- Yes, there are different types of evidence distruction, some of which occurs due to negligence of those on duty and some out of necessity. When evidence is destroyed or lost due to negligence, then action can be taken against those who were responsible, regardless of whether there was ill intention or not. Obviously, when evidence is destroyed during testing out of necessity, no one is responsible for it. It was a decision that had to be taken.
Evidence destroyed by a party to a legal dispute is whole different issue. This is not something that can be ignored because it is a sign that the evidence was harmful to that party's legal standing. In a way, it shows who was guilty. There may be exceptions to this. For example, if someone simply forgets to save a receipt proving that he was somewhere at a certain time of the day, that's not really done intentionally. A court might not take that very seriously.
But if evidence was found and acknowledged and suddenly disappeared or got destroyed, then that's a sign that it was done intentionally.