After Booth had fled the theater, Major Richards, began organizing the activities for investigation until it was taken over by Secretary Stanton. In the hours immediately after the assassination, MPD officers enforced closures of all places of entertainment and helped seal off the city. They patrolled the streets on horses alongside members of the Military Provost. That night on April 14, 1865, an MPD detective entered into the daily blotter: "At this hour the melancholy intelligence of the assassination of Mr. Lincoln President of the U.S. at Fords Theatre was brought to this office and the information obtained ... goes to show that the assassin is a man named J. Wilks Boothe."