'Leave It To Beaver' star Ken Osmond's official cause of death has been revealed. A death certificate obtained by TMZ on Monday states that the late actor, who was best known as the mischievous Eddie Haskell on the hit comedy series, passed away from cardiopulmonary arrest.
The document additionally cited several other underlying causes including chronic obstructive pulmonary disease, anemia, atrial fibrillation, congestive heart failure, depression, hypertension and pneumonia. It further notes that Osmond was a veteran of the United States Armed Forces and was cremated.
Osmond passed away on May 18 at age 76 at his Los Angeles home surrounded by family. His son Eric confirmed his death at the time in a statement obtained by Fox News.
"He was an incredibly kind and wonderful father," Eric said. "He had his family gathered around him when he passed. He was loved and will be very missed."
Osmond pursued acting from a young age. By the time he was nine-years-old he was starring in the film "So Big." He went on to appear in various other films and TV series including 'Good Morning Miss Dove,' 'Lassie' and 'Fury' but his most memorable role was as the trouble-making Eddie Haskell in 'Leave It to Beaver,' which aired from 1957 to 1963. The show starred Jerry Mathers as The Beaver.
In 1970, Osmond joined the LAPD for ten years, but retired after a shootout left him on disability. He continued to act and went on to appear in the telefilm 'Still The Beaver' in 1983, as well as the show's revival, 'The New Leave It to Beaver' and the 1997 feature film 'Leave It to Beaver.'
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