Denise Nickerson

Denise Nickerson (April 1, 1957 – July 10, 2019) was an American former actress, singer, and accountant. She played Violet in "Willy Wonka and the Chocolate Factory" in 1971. She played Allison on season 2 of "The Electric Company" in 1972-1973.
In December 1978, She got arrested after murder of James Jefferis and sentenced to life until 1980 in England, From 1980s to 1990s, Nickerson hired to acting again until 1993.
Nickerson died on July 10, 2019 from a seizure caused by pneumonia at a hospital in Aurora, Colorado at the age of 62.