If your kill switch manages to destroy evidence, that's generally obvious and has two consequences. First, intentionally hiding or destroying evidence of a cri

If your kill switch manages to destroy evidence, that's generally obvious and has two consequences. First, intentionally hiding or destroying evidence of a crime is itself a crime (self-incrimination is restricted only to verbal statements) of which you can be convicted even if you're not guilty of the original accusation; Second, destroying evidence in this manner enables the legal concept of 'adverse inference' where essentially the judge can require the jury to assume that the destroyed evidence did contain whatever prosecution wanted to find there, and convict you based on that.