Did this someone have a scintilla of evidence that that happened?
As I said, it's someone's theory, and it doesn't necessarily conflict with the "St. George and the Drug Goon" narrative so beloved here.
Martin disappears around corner and hides somewhere, losing the bag and can sometime during the process.
Zimmerman gets to "T", looks around, doesn't see Martin, proceeds east to RVC to get that address.
Martin comes out of hiding, retrieves bag and can, Zimmerman comes back west enroute to truck, Martin is enraged that he won't go away and stay away, and comes at him out of the dark.
See, it's possible without contradicting the main narrative.