At least 100 federal investigators are responding to an attack in a Michigan community where a former Marine crashed a pickup into a Mormon church during a Sunday service, shot into the building and set it ablaze. The police chief said officers were on the scene within 30 seconds after a 911 call and eventually fatally shot the man, who killed four people and injured eight more. MORE: https://www.wthr.com/article/news/nation-world/updates-on-deadly-church-shooting-michigan/507-9d2342bd-1465-4161-b955-49a6c97fb4a7