I'm not sure about the rules for the cop himself. However, the prosecution, meaning the DA and his office, are required to disclose to you and your attorney an

I'm not sure about the rules for the cop himself. However, the prosecution, meaning the DA and his office, are required to disclose to you and your attorney anything that would support your innocence (known as exculpatory evidence). I'm not a lawyer, so it's not clear to me how this interacts with the cop's role. As a witness, I guess he wouldn't have to offer anything. But as the guy who arrests you, I'd think that he's part of the "prosecution team", and thus would be covered by the rules of exculpatory evidence. Anybody know more than my supposition?