As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) HAD AN EMERGENCY EXIT DOOR WARNING WHILE ENROUTE. THE FLIGHT CREW DECLARED AN EMERGENCY AND ELECTED TO DIVERT BACK TO BASE. THE ACFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE INVESTIGATION FOUND A DOOR-CLOSED SENSOR BRACKET OUT OF ADJUSTMENT. DOOR SENSOR RIGGED.