A three-month police investigation led to the arrest of a Dunkirk man on charges of possession and sale of marijuana, Dunkirk police said Saturday.
Charles J. DeJesus, 26, of Deer Street sold marijuana to undercover police officers, police said.
The Police Department began a surveillance operation after a neighbor left a tip on a police hot line about suspicious behavior. Investigators said more arrests are expected.
DeJesus was charged with unlawful possession of marijuana, a violation, and fifth-degree criminal sale of marijuana, a misdemeanor.