John Michael Koller, a 66-year-old physician from Kodiak, Alaska, faces five counts of attempting to evade and defeat federal income taxes, according to a federal grand jury indictment returned in Anchorage. Between January 2018 and May 2024, Dr. Koller owned and managed the Kodiak Island Ambulatory Care Clinic, where federal prosecutors say he systematically hid business revenue from the Internal Revenue Service.
The indictment alleges that Dr. Koller submitted fraudulent corporate and individual income tax returns, maintained falsified accounting records, and supplied his tax preparers with incomplete financial figures. Investigators also state he made false statements to officials probing the clinic’s finances.
To conceal cash earnings generated by the clinic, Dr. Koller directed employees to record cash in separate locations, destroyed cash receipts and deposit slips, and kept cash out of bank accounts entirely.
Initial Court Appearance and Maximum Penalties in Alaska
Dr. Koller made his initial appearance on October 9, 2026, before U.S. Magistrate Judge Kyle F. Reardon at the U.S. District Court for the District of Alaska. If convicted on the current charges, he faces a maximum penalty of five years in prison. A federal district court judge will determine any eventual sentence after reviewing the U.S. Sentencing Guidelines and other statutory factors.
U.S. Attorney Michael J. Heyman for the District of Alaska and Special Agent in Charge Adam Jobes of the IRS Criminal Investigation Seattle Field Office announced the charges. The IRS Criminal Investigation Seattle Field Office is handling the ongoing investigation, while Assistant U.S. Attorney Ainsley McNerney is prosecuting the case.
National Tax Enforcement Efforts and the Fraud Division Context
The Department of Justice detailed the case as part of its broader enforcement initiatives to ensure tax compliance. This case arrives alongside a wider federal push highlighted in a [national tax enforcement surge] involving the Justice Department’s Fraud Division and IRS Criminal Investigation.
On April 7, 2026, the Department of Justice established the National Fraud Enforcement Division to investigate and prosecute financial crimes against the public. This specialized unit supports President Trump’s Task Force to Eliminate Fraud, a government-wide initiative chaired by Vice President J.D. Vance targeting fraud, waste, and abuse within federal programs.
Federal officials emphasize that an indictment contains only allegations, and all defendants remain presumed innocent until proven guilty beyond a reasonable doubt in a court of law.
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