ROCKLAND — Rockland police arrested a city resident Friday afternoon following a yearlong investigation into an overdose death.

Cody A. Gnosini-Rubenstein, 27, was arrested and charged with Class B trafficking in drugs, Rockland police said.

Gnosini-Rubenstein was taken to the Knox County Jail in Rockland and was being held Friday evening in lieu of $7,000 cash bail.

The arrest follows an investigation into the heroin overdose death of a Rockland man last summer, Rockland Deputy Police Chief Christopher Young said. The victim was in his early 20s.

Police are still investigating the incident.