Investigators on Monday scoured crime scenes from the worst mass
shooting in Canadian history to try to understand why a dental worker with no criminal past killed at least 18 people.
![Families mourn as police seek motive for Canada gun rampage](http://media.zenfs.com/en_us/News/afp.com/70a67eea5c4eb03b7adf0da943e2021012bf8e4f.jpg)
The
Gunman, identified by
police as 51-year-old Gabriel Wortman, began his rampage late Saturday in the seaside village of Portapique, Nova Scotia, dying 14 hours later in a hail of police gunfire outside Halifax, 100 kilometers (62 miles) away.
"Just how could this happen, we may never know why," Prime Minister
Justin Trudeau told a news conference.