2003 ricin letters lethal dose of ricin in humans provided that exposure is from injection or inhalation. Ricin is easily purified from castor-oil manufacturing waste. It has been utilized by various states and organizations as a weapon, being most effective as an assassination weapon, notably in the case of the 1978 assassination of Bulgarian dissident Georgi Markov. On January 4, 2004 new federal transportation rules took effect which directly affected the over-the-road trucking industry in the United States. The rules took effect with a 60-day grace period and were aimed at reducing fatigue related accidents and fatalities. Called the most far-reaching rule changes
Ricin James Mattis, and the other to Chief of Naval Operations, Admiral John Richardson. Ricin has often been used as a plot device, such as in the television series "Breaking Bad" (Season 2, Season 4 and Season 5). Ricin pellets were also used as the murder weapon in the "NCIS Season 7 Episode 21 – Obsession" The popularity of "Breaking Bad" inspired several real-life criminal cases involving ricin or similar substances. Kuntal Patel from London attempted to poison her "controlling and selfish" mother with abrin after the latter interfered with her marriage plans. Daniel Milzman, a 19-year-old former Georgetown University student,