Investigators are piecing together information about the shooter who attempted to assassinate former President Donald Trump. Here’s what we know about the 20-year-old from Bethel Park, Pa., who authorities named as the suspect. Chapters: 0:00 Assassination attempt 0:15 What we know about Thomas Matthew Crooks 1:33 Crooks’s father and the FBI For the latest reporting on the story from WSJ, visit https://on.wsj.com/3W23Zhy #Trump #Rally #WSJ