Sure,,,just try it. The offer of immunity must be so broadly written for her to know that is a full protection that she can rely on it. Such an offer can never be that broad that the state would offer it. And this would cross state lines, and involves Obamas justice department.
How exactly does a Colorado -state- judge offer immunity for the FEDERAL prosecution that could also result from this womans success at undermining the Obama “guns are the problem” narrative” with her good reporting?
It has happened before. State and Federal DAs will give a writ of immunity to a critical witness. That checks all the boxes - and is common in Mafia cases, for example.