Lee Harvey Oswald Conspiracy Theories Investigation Hardeep Singh Nijjar Terrorism Attempted Assassination Attempted Murder Sikh Separatism Hardeep Singh Nijjar Case Historical Assassinations Robert F. Kennedy John F. Kennedy Corruption Violence Against Activists Threats International Implications Targeted Violence International Assassination Cases Foreign Government Involvement Staging Alexei Navalny's Death Sikh Activist Murder Targeted Killings International Allegations Sikh Activist Hardeep Singh Nijjar Murder Criminal Organizations Opposition Leaders Sikh Separatists Khalistani Separatists Violence Alexei Navalny Mexico Assassination Attempt Notable Assassins Political Assassination Historical Figures Notable Assassinations Martin Luther King Jr. Vadim Krasikov Dissidents FSB Operations Conspiracy Prosecutions Motives for Violence Unsolved Cases