omalu left pittsburgh.o lodi, california. >> he ends up in the dust bowl of north central california, and he's working as a medical examiner there, as far removed from the nfl as anybody could be and trying to figure out how to sort of stay in it. >> i wish i never met mike webster. cte has dragged me into the politics of science, the politics of the nfl. you can't go against the nfl. they'll squash you. i really sincerely wish it didn't cross my path of life, seriously. >> second and three, ball on the three... in motion... wide open... touchdown! >> the brains are precious cargo. >> now back to the third and he goes outside... >> we have to get the brain usually within hours of the death. >> touchdown. >> play action... going deep... >> you have a brain that's intact; it's been removed from the upper spinal cord. >> picks it up looks for running room. he's at the 40, he's at the 45 midfield, he's gonna go! desean jackson! >> narrator: it is the brain of a former football player. >> this is a process that