'Lone wolf' terror suspects usually tell others about their plans, expert says

Edmonton has a cluster of radicalized young Muslims that may have been a factor in the alleged terror attack that injured one police officer and four pedestrians, a terrorism expert said Sunday.
While investigators feel the man arrested acted alone, such people are generally part of a larger radical group and often let others know what they’re planning, said Lorne Dawson, project director of the Canadian Network for Research on Terrorism, Security and Society.
Police said Sunday they have