1534
Apr 20, Elizabeth Barton, [St Magd van Kent], British prophet, died.

1959
Apr 20, British ballerina Margot Fonteyn (1919-1991)) was arrested and briefly detained in a Panama prison. She and her diplomat husband, Roberto Arias, had sought Fidel Castro's help in a revolution that failed because of a last-minute blunder. Fonteyn, born Peggy Hookham, went on to reach even greater creative heights through her acclaimed partnership with Russian dancer Rudolf Nureyev. She returned to Panama with her husband years later and died there.

1998
Apr 20, Moses Tanui of Kenya won the 102nd Boston Marathon in 2 hours, 7 minutes and 43 seconds. Fatuma Roba of Ethiopia won among the women in 2:23:21.

2001
Apr 20, Two therapists were convicted in Golden, Colo., of reckless child abuse in a young girl's suffocation death during a "rebirthing" therapy session. Connell Watkins and Julie Ponder were later sentenced to 16 years in prison.

2001
Apr 20, In Peru an air force jet shot down a Cessna 185 carrying US missionaries. Veronica Bowers (35) and her infant daughter, Charity, were killed when the plane crash landed in the Amazon River. The plane was identified by a US surveillance plane and was believed to be trafficking in narcotics.

2010
Apr 20, Dorothy Height (98), a longtime leader of the US civil rights movement and the chairwoman of the National Council of Negro Women, died in Washington, DC.

2010
Apr 20, In Serbia Biljana Kovacevic Vuco (58), one of Serbia's most prominent human rights activists, died. She played an important role in Serbia's fledgling human rights and anti-war movement during the 1990s rule of late strongman Slobodan Milosevic.

2011
Apr 20, In England Tina Nash (31), a mother-of-two, was assaulted by her boyfriend at her home in Hayle. Shane Jenkin (32) gauged out her eyes and broke her jaw and nose. He kept Nash imprisoned for the next 12 hours, stopping her from seeking help. On April 13, 2012, Jenkin pleaded guilty.

2012
Apr 20, In Arizona Isabel Mercedes Celis (6) was last seen in her bedroom in Tucson.

2013
Apr 20, In Pennsylvania Dr. Autumn Klein (41) died after falling ill at home. A coroner later found cyanide in her system. On July 25 her husband, Univ. of Penn. researcher Dr. Robert Ferrante, was arrested on charges that he had poisoned her. On Nov 7, 2014, Ferrante (66) was convicted of 1st degree murder. On Feb 4, 2015, Ferrante was sentenced to mandatory life in prison.