An Illinois pediatrician who took his own life left behind a suicide note revealing he falsified medical records — and may have not vaccinated children, according to reports.

The note left by Dr. Van Koinis — a 58-year-old pediatrician who ran a practice in Evergreen Park — indicates he felt regret over fudging documents to show his young patients were immunized at the request of parents, the Chicago Tribune reports. The doctor was found dead from a self-inflicted gunshot wound in September.

Koinis' former practice in Evergreen Park, Illinois.
Koinis’ former practice in Evergreen Park, Illinois.Google Maps

“He was well known for being someone who was into homeopathic medicine, and from what we have determined, it was well known that people opposed to vaccination could go to him,” Cook County Sheriff Tom Dart said.

It’s unclear how many juvenile patients may have been impacted, but Koinis’ note suggested that he either doctored records or doled out fake immunizations dating back 10 years, WBBM reports.

“The note was very short,” Dart told the station. “It was a note where he expressed a lot of regret and the note was solely driven at the fact that he did things he regretted as far as the vaccinations … He was incredibly regretful for what he did and it was the only thing he mentioned in the suicide note. It was this and only this.”

Investigators believe parents of children who opposed vaccinations for communicable diseases — which are required by statute for all students in Illinois — sought out Koinis with a “purpose” to get fraudulent records to allow their children to attend schools without receiving immunizations, Dart said.

“There seems to be an overarching depression that was driven by years of not vaccinating people properly,” the sheriff continued. “We were not able to nail it down any further. That was the sole reason he gave for this.”

No evidence has been found indicating that Koinis disregarded parents’ wishes for their children to be vaccinated, but former patients of his should be checked to ensure that they received the proper immunizations, Dart told the Tribune.

Koinis had been licensed to practice in Illinois since 1991, according to state records cited by the newspaper.

No charges have been filed in the suspected conspiracy to falsify vaccination records, but an investigation is ongoing, authorities said.

“I don’t care about your personal feelings on vaccinations, kids need them,” Dart told the Tribune. “You can’t waive them arbitrarily. You clearly can’t forge documents or encourage them to be forged and pass them on, so we’re moving along that track.”