The gunman who attempted to rob Roy T. Jewelers in Bridgewater, N.J., on Feb. 7—killing the owner and himself—left a suicide note at his home, according to Somerset County prosecutors.

According to a press release, 19-year-old Michael Koury entered Roy T. Jewelers around 4:45 p.m. Feb. 7 and immediately demanded jewelry, threatening to shoot the daughter of store owner Roy Devoe with a .357 caliber revolver if she didn’t cooperate.

Devoe confronted Koury, who fired one round at Devoe’s head, fatally wounding him. Koury turned his attention back to Devoe’s daughter, firing one shot at her as she fled the store. She escaped injury.

Koury shot himself in the jaw, cut his throat with a stainless steel knife, and fired one more shot to his head. Prosecutors say Koury was dead when they arrived on the scene.

Devoe was pronounced dead at Somerset Medical Center after officers and medical personnel attempted to save his life.

Prosecutors recovered the revolver and knife at the scene and discovered a suicide note at Koury’s home.

JCK