He was a witness the government thought it needed. Could it have gotten a conviction without him? Maybe. ... But it was a deal made in the early stages of the investigation. Prosecutors didn't know if two were involved or 100 were involved.

They (prosecutors) made the deal and they're going to live with it. It's something that would benefit him in the long run. If nothing else, it keeps him out of the public eye, from being scrutinized by all who know he could have saved all those lives in Oklahoma City.