Dr Patricia Sheehan
Radiation  Assassinations  Down's syndrome

Irish scientist, discovered in the 1980s that mothers of a cluster of children in  Dundalk (pdf) born with Down’s syndrome had been at a boarding school when a 1957 fire in Windscale in Cumbria, northwest England, released radioactive fallout which was blown across the Irish Sea.  In 1994, Dr Sheehan was about to present her findings at an Irish inquiry into birth defects at Sellafield when, following death threats, she was found dead in her car, and her papers were missing. The crash was never fully investigated. http://hildamurrell.org/source-documents/