Pedestrian in critical condition after being hit and dragged three blocks

Ottawa police collision investigators are trying to reconstruct the events that led to a 52-year-old man being dragged for three blocks down a road on Christmas Eve. 
The man was taken to hospital in life-threatening condition after being struck and dragged by a vehicle near Baseline and Merivale roads.
When Ottawa paramedics arrived at the scene, they found the man three blocks east of where he had reportedly been hit on Sunday evening. 
Paramedics treated the man for critical injurie