Georgi Markov people in the inner circles". Georgi Markov was assassinated on a London street via a micro-engineered pellet containing ricin, fired into his leg from an umbrella wielded by someone associated with the Bulgarian Secret Service. It has been speculated that they asked the KGB for help. Georgi Markov was born on March 1, 1929, in Knyazhevo, a Sofia neighbourhood. In 1946, he graduated from the "Gymnasium" (high school) and began university studies in industrial chemistry. Initially, Markov worked as a chemical engineer and a teacher in a technical school. At the age of 19 years he became ill with tuberculosis
Ricin was charged with manufacturing ricin in his dorm room, as well as the intent of "[using] the ricin on another undergraduate student with whom he had a relationship". Mohammed Ali from Liverpool, England was convicted after attempting to purchase 500 mg of ricin over the dark web from an undercover FBI agent. He was sentenced, on 18 September 2015, to 8 years' imprisonment. Ricin Ricin ( ), a lectin (a carbohydrate-binding protein) produced in the seeds of the castor oil plant, "Ricinus communis", is a highly potent toxin. A dose of purified ricin powder the size of a few grains