Brown’s 1 A.M. behavior in the store was all part of the original police report. 40 FBI agents investigated this thing and nothing was ever hidden.
The information about the 1 A.M. drug deal wasn’t submitted to the grand jury because the prosecutor rightly concluded that whatever happened at 1 in the morning had nothing to do with the altercation between Brown and the police officer half a day later.
I guess that answers my question.