The streets of Abbotsford, B.C., will be lined with blue on Sunday as thousands of police officers from across the country and around the world march in remembrance of their slain colleague. Police estimate about 12,000 people — including 8,000 first responders — will attend a memorial for Const. John Davidson. "It's pretty important for us to come together as a family," said Sgt. Judy Bird, spokeswoman for the Abbotsford Police Department. "Our family member was murdered.