Arthur Shawcross died on 10 November 2008, aged 63, while serving his life sentence at the Sullivan Correctional Facility in New York State.
Following a complaint about leg pain earlier in the day, Shawcross was moved to an Albany hospital for treatment. He passed away at 9.50 pm. The cause of death was deep vein thrombosis of the leg, leading to fatal cardiac arrest.
Shawcross is survived by his only daughter, Margaret Deming, who resides in New York.