alicia doreson, your husband what a former chicago bear who killed himself.er found out that he had brain disease. do you think your husband dave knew of the long-term risks when he was playing? >> no, not at all. no one talked to us about long-term risk or the safety of when you get hit, the concussions, what could happen. no, he did not know. >> he didn't know. >> no. >> so your husband shot himself in the heart. >> correct. >> rather than in the head because he knew something was wrong. internally he knew something was wrong. and the people who helped you and helped people looking at his brain to realize that there was something wrong and it was possibly from all the hits he took playing football. >> correct. he took a lot of hits playing football. david was a strong safety with the national football league and he was all-pro five times. he took a lot of hits and gave a lot of hits. >> people should say you should know the risks. these guys know the risks when they're playing here but i'm not sure they did. can you explain what the last ten years it's been