Mike Miske Jr., one of Hawaii’s most notorious criminals, was found dead Sunday morning at the Federal Detention Center, where he had been incarcerated for more than four years.

Assistant U.S. Attorney Ken Sorenson confirmed that Miske was found dead in his cell but declined further comment Sunday.

Miske apparently killed himself, sources told Civil Beat.

In July, after a months-long trial, Miske was convicted of 13 federal counts, including conspiracy to commit racketeering and murder in aid of racketeering. His sentencing was scheduled for Jan. 30 and he faced a mandatory minimum sentence of life on two of the counts.

Miske had been at the Federal Detention Center in Honolulu since his arrest by federal agents on July 15, 2020.

Among other things, Miske was convicted of the murder of Johnathan Fraser in 2016. Fraser was a close friend of Miske’s son Caleb, who died after a car accident involving both young men. Miske believed that Fraser was driving the vehicle that night and was responsible for his son’s death, but evidence showed that it was Caleb Miske who was behind The Wheel at the time of the accident.

Fraser was last seen on July 30, 2016 and his body was never found.

The defense claimed that Miske had nothing to do with Fraser’s disappearance and suggested alternative theories for the fact that he had not been seen for almost a decade.

Prosecutors alleged that Miske was a master manipulator who led an extensive organized crime group that carried out intimidation, kidnappings and murders.

Defense attorneys described Miske throughout the trial as a successful businessman who helped his community. Miske owned several businesses, including his famous fumigation company, Kamaaina Termite and Pest Control.

His trial began in January and lasted about six months. He stood trial alone after his half-brother John Stancil and daughter-in-law Delia Fabro Miske took plea deals just before opening arguments began.

About a dozen of Miske’s associates were also implicated in Miske’s various charges, and all but Miske made deals with prosecutors that in most cases included testifying against him.

It was one of the most complex criminal trials in the country, involving millions of documents and hours of audio and video evidence.

Miske’s attorney, Michael Kennedy, did not respond to a call seeking comment Sunday.

Kennedy said after the trial that he planned to appeal Miske’s convictions.