Updated at 5:10 p.m. Friday with comment from an attorney for Bradley Harris.

The former executive of a Frisco hospice admitted Thursday to overdosing patients to "hasten their deaths" so the company could make more money, court records show.

Melanie Murphey, 36, admitted serving as the "go-between" for Novus Health Services owner Bradley Harris, doctors and nurses in an alleged $60 million scheme.

Murphey, Novus' director of operations, pleaded guilty to health care fraud and is expected to testify against 15 others in the case, including Harris and his wife, Amy. The other defendants have pleaded not guilty.

Chris Knox, an attorney for Bradley Harris, said Friday evening that "we are aware of the allegations lodged by Ms. Murphey in her factual resume and we wholeheartedly disagree with her opinions. We are not aware of any evidence that shows that Mr. Harris caused, hastened or otherwise contributed to the death of the hospice patients being treated by Novus."

An attorney for Amy Harris declined to comment.

When news of the federal investigation became public in March 2016, Novus posted a statement online, saying, "We have not and would not — ever — willfully harm any patient."

Bradley and Amy Harris were among 16 people indicted in a $60 million Medicare fraud scheme. (Facebook)

Murphey admitted in court records that she defrauded Medicare and Medicaid by billing them for patients who did not qualify for hospice services. She also admitted filling out forms as though she were the doctor by using notes taken by a nurse.

Court records show that Murphey also admitted she followed orders for patients' care from Bradley Harris, who has no medical training. The patients did not see a doctor in person before they were admitted.

She said Harris' directives were intended to drive up profits.

Harris ordered that patients who stayed beyond the time they allowed Novus to turn a profit receive higher doses of "whatever narcotic was being used, generally morphine, Dilaudid or Ativan," records show.

He also sent a text to a nurse that said, "You need to make this patient go bye-bye," according to an affidavit.

Murphey admitted falsifying paperwork, including orders to not resuscitate patients. This was done to avoid paying for ambulance trips to a hospital if a relative called 911.

Murphey faces up to 10 years in prison.

The indictment alleges that from July 2012 to September 2015, Novus billed Medicare and Medicaid more than $60 million for fraudulent hospice services. The government paid Novus more than $35 million.

The defendants are accused of submitting false claims for hospice services, submitting false claims for continuous care hospice services, recruiting ineligible hospice beneficiaries by providing kickbacks to referring physicians and health care facilities, and falsifying and destroying documents to conceal these activities from Medicare, federal officials say.