On July 25, 2013 at approximately 3:15pm Transit Police detectives were at Andrew Sq. MBTA station conducting undercover drug enforcement. While there a male, later identified as Kevin Bacchus, 33 of Mattapan sold marijuana to an undercover TPD Detective. Shortly after the transaction Bacchus was taken into custody and transported to Transit Police HQ for the arrest booking process. During this time it was discovered there was a warrant in existence for Bacchus' arrest issued out of Hingham District Court for Assault & Battery and for violation of the Commonwealth's Drug Laws. Bacchus is expected to be arraigned today in South Boston District Court for Distribution of a Controlled Substance.