The Robbers knows Chris Brown Was Clubbing Before Invading His Mansion - Cops

According to Tmz, the robbers knows Chris Brown not at home and he was clubbing before they invaded his LA mansion..

Law enforcement sources tell TMZ, the robbers told Chris' aunt shortly after breaking in, they knew he was at a Hollywood nightclub and needed to move fast before Chris came home.

Chris was hosting a pre-ESPY party which had been publicized, but law enforcement believes based on what the robbers told his aunt, they had someone at the club keeping tabs on him.

Although the identity of the robbers is unknown -- they were wearing ski masks -- we're told cops believe the culprits knew Chris and very possibly knew the layout of the house. Chris had a bad habit of inviting random people from the clubs to his home.