Here is the Timeline from DM:
A MATTER OF MINUTES: TIMELINE OF THE MICHAEL BROWN SHOOTING
11.48am - Officer Darren Wilson and an ambulance crew were at an unrelated call about a sick person
11.51am - A 911 call comes in about a ‘strong- armed’ robbery at a nearby convenience store
11.52am - Police radio dispatch gives a description of two robbery suspects who assaulted a clerk and stole Swisher Sweet cigars. The clerk says the suspects were walking toward the QuickTrip gas station
11:57:47 - the suspect’s description was released by dispatch
12:00:00 Wilson left the scene of the sick call
12.01pm – Officer Wilson encounters Michael Brown walking in the middle of the street in the 2900 block of Canfield Drive. The officer shoots Brown dead following an altercation
12.04pm – A second officer arrives on scene and the ambulance from the sick call arrives to give Brown medical attention. He is declared dead at the scene
12.05pm – A supervisor arrives at the scene of the shooting
It appears to have been a single encounter. He drove past the guys and told them to get out of the street but when Brown mouthed off to him he stopped and backed up and then the dance started.
So you still believe your”credible witness”, right chippy the troll?
He drove past the guys: Encounter 1
He backed up: Encounter 2
From 11:48 to noon, the officer involved in the shooting was on a sick call on Glenark [Drive], there was an ambulance present. At 11:51 there was a 911 call from a convenience store nearby. At 11:52, dispatch gave a description of a robbery suspect over the radio. A different officer arrived at the store where the strong-arm robbery occurred. A further description was given over the radio that stated the suspect was walking toward QuikTrip. The officer left the sick call. He encountered the– At 12:01, our officer encountered Michael Brown on Canfield Drive. At 12:04 a second officer arrived on the scene immediately following the shooting. At 12:05 a supervisor was dispatched to the scene and subsequent officers arrived. There have been some questions about the calling of an ambulance. The ambulance that was at the sick case at Glenark was coming by immediately following the shooting and they did respond to assess Michael Brown.
NOTE: Your timeline does not mention that a further description was given over the radio by the officer that responded to the robbery scene as documented above and in the official report here: Ferguson Police Department Offense / Incident Report 14-12388