Kennedy was most familiar to British audiences for his work as a newsreader and television presenter, which spanned six decades. He also wrote more than a dozen books and television films, often about miscarriages of justice - most notably his 1961 book Ten Rillington Place.
That project argued the case of Timothy Evans, who was executed for the murder of his baby daughter. The culprit was later uncovered as serial killer John Christie.
Evans was later posthumously pardoned.
Kennedy's book was turned into a 1970 movie starring Richard Attenborough and John Hurt.
According to his family, Kennedy died in a nursing home in Salisbury, England on Sunday (18Oct09) - just a month before his 90th birthday. He had been ill for some time after contracting pneumonia following a fall.