http://www.dailymail.co.uk/news/art...-Ferguson-police-character-assassination.html
Not sure if I am doing this right, but this link has a map showing where everything happened. The shooting occurred between where the robbery took place and where the sick call was at, so I would imagine that they were, in fact, approaching one another. I too have always thought he came at them from behind, so I kind of felt that they hadn't realized he was there right away, but he must have been coming right at them.
Also, (hope I'm getting this correct) but a close up view of the road on Google maps clearly shows not only the fact that there are sidewalks, but there is also a yellow line going down the center of the road. I had originally thought this was a typical neighborhood side-street, but Canfield is actually a secondary through street. Certainly not a highway like Florissant, but definitely a main drag. I also took a leisurely stroll down the street using Google maps to try to recreate their walk from the convenience store and there are several cars on there as well as several people walking - on the sidewalks.
https://www.google.com/maps/@38.738...!1e1!3m2!1sZbrMDygFZKivEMZag_1J4g!2e0!6m1!1e1
My point is that walking down the center of that street, in my opinion, is probably not an every day occurrence!