More than four days after a report alleging to link Broncos quarterback Peyton Manning and his wife, Ashley, to human growth hormone (HGH) was published, new details about the report’s primary source and the doctor who treated Manning in 2011 have come to light.

In al-Jazeera’s undercover investigation, ” The Dark Side,” Charles David Sly, a man labeled as a pharmacist, was filmed saying HGH was shipped from The Guyer Institute in Indianapolis to Ashley Manning “all the time, everywhere, Florida. And it would never be under Peyton’s name. It would always be under her name. We were sending it everywhere. It would go to Florida.”

Peyton Manning was a patient of Dr. Leonard Guyer while recovering from four neck surgeries in 2011. In a televised interview on ESPN Sunday, Manning said he received only holistic treatments from Guyer, adding that any treatment his wife received is “her business.

MORE: Al-Jazeera reporter defends Peyton Manning HGH report; says alleged shipments raise serious questions

“I don’t have a whole lot to add to what I said on Sunday,” Manning said at the Broncos’ facility Wednesday. “The report wasn’t true Sunday, it’s not true today and will never be true. I’m still angry about it.”

Manning, upset his wife was drawn into the controversy, said he hasn’t decided if he’ll take legal action and doesn’t want “to deal with it until after the season.”

The connection to HGH is not new for Guyer. As noted by The Indianapolis Star, a 2007 federal indictment against Thomas Bader and College Pharmacy of Colorado Springs alleged Guyer received Chinese HGH that was not approved by the FDA from College Pharmacy “on or around Feb. 22, 2007.”

Bader was found guilty in 2010 and sentenced to 40 months in prison for illegally importing human growth hormone from China and other charges related to his sale of HGH.

The Internal Revenue Service, according to a separate report by The Star, filed tax liens on Guyer for hundreds of thousands of dollars.

Guyer is in the middle of a divorce case to Lisa Guyer that has lasted more than six years. According to a 2010 document obtained by The Star, Lisa Guyer claimed Leonard Guyer “has not filed tax returns (personally and/or for his multiple businesses) since 2006.”

Leonard Guyer received a physician license in Indiana July 1, 1992, with a specialty of family medicine, according to state records.

According to The Guyer Institute’s website, the clinic offers services that include stem cell therapy, platelet rich plasma therapy, and bioidentical hormone replacement, among over invasive and non-invasive treatments.

New patients are required to fill out a handbook before their first appointment. Included in its “patient consent” is the disclaimer: “Dr. Guyer may prescribe a supplement not evaluated by the FDA, we will explain the possible side effects to you; however you must ultimately decide if you are comfortable with the course of treatment prescribed for you.”

The handbook also requires patients to sign that should they “initiate or pursue a meritorious medical malpractice claim against Dr. Dale Guyer with Guyer Institute, PC and Advanced Nutriceuticals, LLC. I agree to use as expert witness (with respect to issues concerning the standard of care), only physicians who are board certified by the American Board of Medical Specialist in the same or similar specialty as Dr. Dale Guyer with Guyer Institute, PC and Advanced Nutriceuticals, LLC. Further I agree that these physicians retained by me or on behalf to be an expert witness will be a member in good standing of the medical specialty society to which Dr. Dale Guyer belongs.”

The American Board of Medical Specialties’ website, however, does not show a Dr. Leonard Dale Guyer registered for any specialty.

Sly, al-Jazeera’s primary source in the allegations against the Mannings, recanted his comments in the documentary via a video statement Saturday night. The documentary said Sly worked at the clinic in 2011, but Sly and the clinic have since claimed he was not an intern at The Guyer Institute until 2013.

According to Indiana state records, Sly was a licensed pharmacy intern from April 27, 2010 to May 1, 2013.

On Wednesday, Jason Roth, the vice president of communications for Roseman University of Health Sciences in Henderson, Nev., confirmed to The Denver Post that Sly was a student at Roseman’s College of Pharmacy from August 2009 to August 2013 and that he received his doctorate of pharmacy in 2013. Roth was unable to confirm the dates of Sly’s internship with The Guyer Institute, but told The Post that internships typically are done in a student’s final year of schooling.

Denver Post writer David Migoya contributed to this report.