Cynthia Jefferies [Edit] By Sticky Facts Editorial StaffCynthia Jefferies biography, ethnicity, religion, interesting facts, favorites, family, updates, childhood facts, information and more:When did Cynthia Jefferies die?March 3, 1983Why did Cynthia Jefferies die?Suicide-Drug overdose Tags: death day 3death month marchdeath year 1983 Suggested Posts Sylvester Stallone Facts Marilyn Monroe Facts Steve Jobs Facts Chester Bennington Facts Julia Roberts Facts Amy Adams Facts Justin Timberlake Facts Vin Diesel Facts