Riots ensue in 3… 2… 1…

Ferguson, Missouri (CNN) — A decision is expected Monday from the grand jury in Ferguson, Missouri, that is weighing evidence in the Michael Brown shooting, U.S. and local law enforcement officials told CNN.

The announcement will come from the St Louis County Prosecutor, the sources said.

The sources did not know what decision will be announced.

The city has been on edge in anticipation of a decision. Some businesses have been boarded up, and activists are prepared to protest.

For the grand jury, the key question is whether Officer Darren Wilson, who is white, will face charges in the August 9 shooting death of Brown, 18, who was black.

Though the basic facts of the case — that Brown was unarmed when Wilson shot him — are not in question, the facts of the fatal moment are hotly disputed.

Update:

Update: Any predictions?

Update: Heads up on the time change. It’s 8pm CST (not EST as initially reported).