My post was a bit vague so I will try to explain what happened. My apologies for this sometimes I get so behind that I rush my posts and don't re-read them.
Asher was facing Luke (Luke to the North). Luke drew on the Townfolks (Coming from the North East) and at that moment someone else shot Asher three times in the back. Not Luke, but a mysterious someone else.
Now they were on the main street at the time but it was dark. Whoever shot the Kid would have been down the street
(South of Asher).
On the map, this is outside of #20 (Lawrence Saloon).