Roughly a dozen investigators searched Bieber's home and arrested one member of the singer's entourage on suspicion of cocaine possession, Lt David Thompson said.
The man's name was not immediately released, but Thompson said the cocaine was in plain view in Bieber's house when deputies arrived.
Bieber, 19, was at the home and cooperated with authorities but was not interviewed by detectives. Lt Thompson said he expected the singer to speak with detectives when his attorney could be present.
"He has not been arrested, nor has he been exonerated," Lt Thompson said of Bieber.
Lt Thompson declined to describe what evidence detectives took from Bieber's home.
He said the house Bieber allegedly egged had custom wood and other expensive features and that several thousands of pounds of damage occurred.
Previous investigations into Bieber's conduct by the sheriff's department against the Boyfriend singer have not resulted in charges.
In October, prosecutors declined to charge Bieber after a neighbour complained he drove recklessly through the area. Prosecutors in November 2012 also declined to charge the singer after a paparazzo accused him of punching and hitting him after leaving a cinema.