It does not matter that the prosecution knew of the evidence, the fact that the police knew is enough. Kyles v. Whitley . D does not have the unrestricted right to examine evidence in order to have a better prepared case. Compulsory process is not necessarily violated because D did not examine evidence. Material evidence must be disclosed.
Court can do an In Camera review of evidence and determine if it is material.
Pennsylvania v. Ritchie . Evidence was lost or destroyed - D must show bad faith and what evidence would have shown Arizona v. Youngblood 4. The record must indicate the circumstances with which the plea was made D must have adequate council 2. A plea is involuntary if the deal is not kept 4.