Valerie got her last name from her husband who was a pilot with whom she had five children. Both Valerie and her husband participated in the celebrations of the Independence of Guayana in 1966 in an aerobatic display.
Separatist movement
Being a member of Guyana's Amerindian Party along with her husband's family, she was present at the First Conference of Amerindians Leaders, named the Cabacaburi Congress, that presented several demands to the Prime Minister Forbes Burnham representing the community of around 40,000 indigenous people of the region. In the 1968 Guyanese general election, Hart ran for a seat in the National Assembly of Guyana under The United Force party. On the morning of2 January 1969, there was a peasant uprising against the authorities of the district and took public buildings, airports, and hostages. Valerie was named First President of the Essequibo Free State that immediately requested the Venezuelan protection of the Raúl Leoni government. That night, the rebellion was violently suppressed by Guyanese Defense Forces, resulting in the destruction of several indigenous homes, around 100 death people and the escape of many indigenous to Brasil and Venezuela.
Exile
That same night, Valerie Hart fled with her family to Ciudad Bolívar, before going toCaracas to request military aid from the Venezuelan government; according to her, her goal was, on behalf of the rebels, to create an independent region of Guyana. On the other hand, Mrs. Valerie Hart had private meetings with Venezuelan Interior and Foreign Ministers, Reinaldo Leandro Mora and Ignacio Iribarren Borges, respectively, in search of help, as well as expressing interest in requesting an interview with the President Raúl Leoni and with the winning candidate of the last elections and next president Rafael Caldera. From the interviews conducted with the Venezuelan Foreign and Interior ministers, she said that they had not made any offer, since they told her that they were very sensitive international political issues. Hart exiled herself to the state of Texas in the United States. Her current whereabouts are unknown.