If McCabe turned it down, it had to have been something severe such as "you can have 25+ - life with no chance of parole vs. the death penalty."  The former is a death sentence for a man of his age.  If I were the prosecutor, I'd offer that up if the guy would cough up dirty details.    I'm actually surprised he didn't take it - he seems like too much of a weakling not to grasp the chance for life.  This is all assuming the info fed to Levin is correct.  Could be disinformation to pacify (((them))) into thinking that McCabe's staying quiet.