Four people have been arrested for selling heroin in Olean. Police say 26 year-old Katie Willis of Olean, 26 year-old Sean Galmer, who is currently incarcerated at the Cattaraugus County Jail, 26 year-old Samantha Clarke of Olean and 28 year-old Robert Smith of Portville are all facing various charges related to the sale of heroin. Police say the four cases are not connected to each other. The arrests came after a three month long investigation by the Olean Police Department’s Street Crimes Unit.