A medical malpractice insurance company claims it does not have to pay any damages that may be awarded to former patients of a Murray doctor charged in their deaths.

In court documents filed Tuesday, the Utah Medical Insurance Association argues its insurance policy issued to doctor Warren R. Stack does not cover the deaths of patients Brandon Scott or Thaison Roark.

Stack, 61, is accused of illegally prescribing painkillers to as many as 80 people a day, leading to the deaths of at least five people.

He was indicted last year on 18 criminal counts, including conspiracy, dispensing drugs outside the bounds of medical practice resulting in death, unlawful distribution of a controlled substance and health care fraud.

One of Stack's employees has pleaded guilty to conspiracy in the case and agreed to testify against Stack in federal court, the association stated.

Stack's insurance policy excludes coverage for acts that violate the law, the association wrote. That means it does not cover the deaths of Scott or Roark, whose families have sued Stack.

Scott was 34 when he died in 2005. Roark died in 2006 at age 20. Court documents state that drugs prescribed by Stack also led to the deaths of Tyler Lugo, 24; Kaydie Winters, 25; and Michael W. Barker, 50.

- Erin Alberty