A train ride, selfie and more: What DOJ says happened before press gala shooting

The suspect in the White House Correspondents' Dinner shooting appears to have started planning the attack three weeks ago when he began to search online about the event, according to new details in a memorandum prosecutors filed Wednesday in federal court. The filing includes more information about suspect Cole Allen's alleged movements on Saturday night, his apparent state of mind during his cross-country train trip to Washington, D.C., and how he allegedly planned the attack. …