I'm having trouble to understand the following sentences, from a book called It's from a book called 'Doing Justice', by Preet Bharara (not a web page).
1) The issue was clear, though the answer was not: Do we pursue the letter of the law, the clearly applicable and fitting mandatory minimum statute and arguably undermine justice by jeopardizing the conviction at trial and visit more suffering upon the kidnap victim? Or do we permit a plea to a different subsection and arguably undermine justice by allowing the possibility of a too- light sentence?
=> I'm not sure the meaning of 'jeopardizing the conviction at trial' (In this sentence, 'we' is 'prosecutors')
2) Rubio was given time served, which amounted to just about six years in federal prison, with another three years pending on an unrelated fifteen-year state charge.
=> I know that if he is convicted for another crime, he could go back to jail for another three years. But I have no idea what 'fifteen-year state charge' means.
Please make it clear for me. Thanks.