Mostly Credited As: John Mantley Birth Name: John Truman Mantley Date Of Birth: April 25, 1920 (Age 82) Country Of Birth: Canada Birth Place: Toronto, Ontario Date Of Death: January 14, 2003 Cause Of Death: Alzheimer's disease
John Mantley died at the age of 83 and was born on April 25, 1920.
He is known for the show Gunsmoke (Executive Producer).
He was born in Toronto, Ontario (Canada) and died on January 14, 2003,
He is deceased (Alzheimer's disease)