According to the TMZ link in OP, Brown's attorney, Mark Geragos, is there. Waiting for Brown to surrender (per TMZ or true, I don't know). He supposedly threw a duffel bag with at least one gun, other weapons, and drugs out a window. This all started after a woman called 911 reporting Brown was brandishing a gun in a threatening manner.
what a ridiculous rant Brown posted in a video available on this same linked TMZ page.
I know it's not the same everywhere, but our local PD's robbery/homicide unit is another name for what other departments call their major crimes or violent crimes unit. They investigate many crimes other than robberies & homicides, so it's a bit of a misnomer.