He didn’t appear to be a “suspicious” individual given others who were also standing around. Rather he looked like just another bystander among those behind Abe.
You just never know as they all walk among us every day....and with our border invasion now you can bet we won’t be able to tell which ones are going to act ciminally. In their cultures it’s often “normal” to take, rob, steal and rape.
You don’t let anyone with a bag or backpack that close to the prime minister.