Altheia Jones-LeCointe (born 9 January 1945) is a Trinidadian physician and research scientist also known for her role as a leader of the British Black Panther Movement of the 1960s and 1970s.

[4] They were all acquitted of the most serious charges and the trial became the first judicial acknowledgement of behaviour (the repeated raids) motivated by racial hatred, rather than legitimate crime control, within the Metropolitan Police.

[3][6] While studying in London, Jones-LeCointe became involved in community organising against racism and for the rights of people of African and Asian heritage in the UK.

This included building structures into the organisation to ensure that men suspected of the abuse or exploitation of women were interrogated and punished if found guilty.

[3] W. Chris Johnson, writing in Gender, Imperialism and Global Exchanges (edited by Miescher, Mitchell and Shibusawa, 2015), states: "Jones-LeCointe's authority, and her energetic pursuit of justice, unsettled Panthers who did not see anti-sexism as an intrinsic part of revolutionary praxis.

They produced a newspaper, Freedom News; led campaigns against police brutality and discrimination in employment, housing and education; and ran sessions to encourage black people to study books by radical authors.

"[6][13] As part of the Mangrove Nine, Jones-LeCointe and her fellow activists successfully defended themselves and for the first time, spoke about racism in the Metropolitan Police on an official platform - the courtroom.

[5] Jones-LeCointe was one of the nine protesters arrested and tried in what has since been described as "Britain's most influential black power trial",[4] and by Bryan Knight of The Guardian as "one [of] the most significant legal cases in British history.

[4][3][15] In December 1971, the jury found the defendants not guilty of the most serious charge of conspiracy to incite a riot, which marked a turning point for racial justice in the UK and the recognition of systemic racism within British institutions.

[18] Guyanese/English actress Letitia Wright portrays Jones-LeCointe in the Mangrove episode of Steve McQueen's 2020 film anthology/television miniseries Small Axe.