 We all have a responsibility to do that. As for the investigation into the attack on Donald Trump, the gunman's motive is unknown. The Secret Service says it killed the suspected shooter, identified as 20-year-old Thomas Matthew Crooks, who they say opened fire from a rooftop of a nearby building outside the Trump rally venue. One bystander was killed, two others critically wounded. The FBI says it believes Crooks acted alone. This is AP News.