Witnesses are crucial in Florida brain injury cases. First off, you're going to need to have an expert witness who can attest that the injury that you suffered led to a brain injury. So you're going to have to have an expert witness. But over and above that, and perhaps even more important, you're going to need to have people who know you, who have observed differences in you before and after the accident. A test that you're not functioning the same. Maybe your cognition, your reasoning ability, is not the same. Sometimes people even have personality changes. It is people who know you, who can witness that.