Question: Okay, I did use her grammar, so you're saying I should have cleaned it up a little? Also I should believe sources when I know they're lying?
Answer: Yes on the grammar. Cleaning it up is just a nice thing to do and will make anyone happier to talk with you a second time. That's important when you have a regular beat where you deal with the same sources over and over. When I worked on a daily newspaper, I had cops and courts. Cops are almost always glad to talk about their work, but few of them know grammar.
Second, and most important: IT IS NOT NECESSARY TO BELIEVE WHAT THEY TELL YOU TO WRITE DOWN THAT THEY HAVE SAID IT.