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.

BC man convicted of manslaughter
Hamilton Boulevard trail cleared as winter pilot project wraps up
Yukon RCMP roll out new navy-blue uniform shirts
Yukon releases final flood maps for Dawson, Klondike Valley, Upper Liard
Inquest into the death of Manui Roux to be held in Whitehorse
Yukon municipalities to receive record $30 million in funding
Yukon expands winter electricity relief for residents
Ross River Dena Council says 'no' to proposed mining on its traditional territory
LSCFN stands firm: 'No mining in the Breadbasket'
Yukon Government accepts responsibility for abuse at Jack Hulland Elementary
Whistle Bend road connector project gets $8.7M boost from federal government
Yukon Government signs deal with Alliance Health for primary care clinic
Man Missing in Whitehorse: Reuben van Klaveren Sought by RCMP
Yukon Government passes health authority act amendment amidst first nations concerns
Selkirk First Nation announces election results
Carcross/Tagish First Nation cuts community safety services amid funding shortfall
Yukon First Nations Outraged Over Clean Energy Act Repeal
The Yukon Employees’ Union is weighing in on the Health Authority Act’s uncertain future
The Village of Haines Junction has announced the launch of a new grant program
Yukon's air ambulance program gets upgrade