Detectives were searching the singer's Calabasas mansion on Tuesday for evidence that Bieber allegedly tossed eggs at a neighbour's home, reported the Los Angeles Times.
The singer's neighbour had called the detectives to report that his house had sustained USD 20,000 in damages after 20 eggs were thrown at his home by Bieber.
The investigator found drugs there and took Lil Za aka Xavier Dominique Smith, 20, into custody.
Bieber "was not connected to the (drugs) other than the gentleman was staying at his residence."
The singer, however, remains a suspect in the egg throwing incident, which is latest in his clashes with his neighbour.