He jumped bail because Mexico is a corrupt third world nation and what he did kind of hurts the Mexican business of taking bad guys in for money.
Chapman has money, so first look for Mexico to hold a gun to his head in fines compared to most other people.
Then look for them to jail them as an example to others who would think to do something regarding this drug cartel run third world nation.
Chapman has money now and if he would have been a man and faced the Mexican charges(and IMO, would have been acquitted due to the resulting publicity) he would not be in this situation right now.