18-year-old Patrick Lena and 16-year-old Scott Hayes, before engaging in a standoff with responding police officers. After the gunman aimed his weapon at football coach Don LeBrun, Concord Police Officer Michael Russell shot Cartier in the head with his service revolver, wounding him. Cartier returned fire with one shotgun blast at police, wounding police officer Stephen McDonnell in the chin with a shotgun pellet, before being shot twice more in the chest by Russell and CPD Officer John Clark. Cartier died of his wounds the following day in the hospital; Officer McDonnell was treated and released.
