Leon Nepper was pronounced dead at 1:25 pm on Sunday and the Yukon Coroner's Service, along with the assistance of the RCMP, are continuing their investigation.
Chief Coroner Heather Jones has notified the public that Leon Nepper, an accused mail bomber and Whitehorse resident who was facing charges of attempted murder, has died in Whitehorse hospital.
Nepper was taken into custody following on September 13th following his suspected role in the mailing of an explosive device which went off at his brothers residence in Port Alice, BC.
Roger Nepper, Leon Nepper's brother, lost several fingers in the incident when he opened the exploding package at his home.
Leon Nepper was found to be in distress after being put into custody at the Whitehorse Correctional Centre and consequently was transported to Whitehorse General Hospital where he was later pronounced dead at 1:25 pm on Sunday.
The Yukon Coroner's Service and Whitehorse RCMP were called to attend the death at the hospital as well.
Nepper was 73 at the time of his death and an autopsy is being conducted at Vancouver General Hospital later this week.
The Yukon Coroner's Service, with the assistance of RCMP, are continuing their investigation.

Teslin RCMP arrest two following search warrant
CYFN's Moccasin Mobile Outreach Program receives national recognition for harm reduction efforts
Winter Games Wednesday with Nancy Thompson - Wednesday 25th February (Audio)
Tr’ondëk Hwëch’in and Yukon Government partner on Dawson land planning initiative
Yukon University strike averted as union reaches tentative agreement
Yukon Government seeks input on new École Whitehorse Elementary School location
Whitehorse 2026 Arctic Winter Games schedule unveiled
Jeremy Harper elected as Chief of Selkirk First Nation
Yukon government pauses implementation of Health Authority, considering repealing Health Authority Act
Yukon University withdraws from AWG
$300,000 fund boosts student attendance initiatives in Yukon schools
Whitehorse to host 2026 Broomball World Championships
Harper to run for SFN chief
Helicopters head to Alaska for exercise
First Nations warn of increased scrutiny at US border, citing ICE actions
Art brings hope to Whitehorse Shelter amidst challenging times
Yukon Schools to benefit from national School food program
Yukon Liberal Party shuffles leadership