Hopefully this will help you get a better grasp of the timeline.
Address of Shooting - 2900 Canfield Drive, Ferguson, MO.
Address of Ferguson Market and Liquor - 90 W. Florissant Ave. (.6 miles, walking time 11 mins. from apartment complex)
Address of QT -9420 W. Florissant Ave. (reported 1/4 mile from the apartment complex)
Correction: It is 11 mins. from the apartment complex to Florissant Ave. It is a further 8 mins. from there to Ferguson Market and Liquor Store.
19 Minutes at a minimum. Longer with your pant waist down around your knees.
I did mess up the Ferguson Liquor store address because of the darn “1” on my keyboard.
IIRC, it is 9011 W. Florissant Ave (corner of W. Florissant Ave and Ferguson Street).