 The fourth member is Chief David Mitchell, a former Maryland state police superintendent. The panel's 45-day review will examine the planning by the Secret Service and its state and local law enforcement partners ahead of former President Trump's rally in Butler, Pennsylvania. It will also look at those agencies' actions during and after the attempted assassination that day. Mayorkas says the review will make recommendations to prevent something like the shooting from ever happening again. Ryan Lucas, NPR News, Washington.