that the thing for him that was beyond the pale was what he describes as all of the efforts to obstruct major league baseball's investigation. >> tacopina: scottble. when you say that, i... i looked and i just... i... i'm in disbelief when i hear that because it's... it's almost the exact opposite. major league baseball went on an effort and a campaign to obstruct justice by... by forcing and compelling witnesses, threatening witnesses. and they have the gall-- the gall to accuse alex rodriguez of obstructing the investigation? i mean, it's... it's laughable. >> pelley: tony bosch told us, after he turned down the colombia offer, things got sinister. he says his ex-girlfriend received a text message, in spanish, saying bosch would not live to see the end of the year. his world was shrinking, but he didn't know the half of it. at the manhattan headquarters of major league baseball, rob manfred had his sights on bosch. a lawyer by training, manfred runs major league baseball as the chief operating officer. commissioner selig told him to do what he had to do to get to the bottom of the scandal. manfred hired the former director of the united stat