One of Canada's most notorious mass murderers is back behind bars after he was denied parole on Tuesday.

It is the second bid for freedom for David Ennis who is serving time at the Bowden Institution for murdering a B.C. family back in 1982.

David Ennis was known as David Shearing when he brutally murdered six members of the same family near Clearwater, B.C.

Ennis killed Bob Johnson, his wife Jackie, their daughters 13-year-old Janet and 11-year-old Karen, and the grandparents, George and Edith Bentley while the group was camping at Wells Grey Provincial Park in B.C.

Their charred bodies were found in a burned-out car and thirteen months later, after an exhaustive search, their camper was discovered nearby.

Ennis pleaded guilty to six counts of second-degree murder and has been in jail ever since.

He was sentenced to life without parole for 25 years and is now eligible to apply for parole every two years.

He made his first request for parole in 2008, but the request was also denied.