It’s depressing that over 100 people will spontaneously gather to violently prevent the arrest of a murderer, simply because they are all of the same race. It’s beyond depressing, really—it’s disgusting.
They’ve been hanging out there all day. The “crowd” was already there, although some of its members may have had to beep their friends who were up in their apartments watching TV. We have a convenience store in my town where the pavement is thick with guys who just stand around all day, drink a little beer, sell a few drugs, and then go find their “baby momma” to collect some walking around money from what she has collected from welfare. Pretty pathetic.
It's possible that much of the crowd were "business acquaintences" of the perp, who of course do not want to see their friend get taken.