A 73-year-old man incarcerated by the state of Vermont died on Monday while receiving palliative care at a hospice facility in New Hampshire, according to the Vermont Department of Corrections.

Roy Patten, of Lebanon, New Hampshire, had been taken April 9 from Southern State Correctional Facility in Springfield to the Springfield Hospital emergency department “after exhibiting signs of medical distress,” the corrections department said in a press release Wednesday evening. 

He was subsequently transferred to Dartmouth Hitchcock Medical Center in Lebanon and then to its Jack Byrne Center for Palliative & Hospice Care, according to the release. 

Patten’s death does not appear suspicious, corrections officials wrote. A standard investigation into his death is ongoing. 

Since 2014, he had been serving a sentence of 13 years to life for aggravated sexual assault, according to the release.