kaepernick, who was given the starting job because alex smith was out for a week with a concussion, and now a lot of people are saying, wow, alex smith losing his job is an incentive for players not to report when they get head injuries. we know how conclusively they're he linked. i do have to say one thing, though. you're absolutely right, tamron, that people have different ways of dealing with things and perhaps being on the field. had a healing effect on the players themselves. i think the nfl as the largest sports force and cultural force in this country has a broader responsibility to say some things are more important than football. >> dave, it's always great to have you on. i want to report to our audience the associated press says police hope to deliver an investigation report to prosecutors tuesday detailing what caused kansas city chiefs linebacker javon belcher to kill his girlfriend and himself. we could have an update on the incident which, of course, is absolutely devastating and unthinkable. coming up, nbc political