Prosecutors have to turn over in discovery any evidence they're using and any evidence that might be exculpatory.

For example, in Florida they mentioned today all surveillance footage up to a certain date and all grand jury interviews were turned over.

I think the idea of you asking them for discovery is from a civil case. I don't think that applies in a criminal case.

But if prosecutors do not turn over everything before trial, the defendant can go free. It's known as a Brady violation