January 3: The tariffs of metropolitan buses, trains and subways in Buenos Aires are increased.[1]
January 4: Union leader Marcelo Balcedo, accused of money laundering, is detained in Uruguay, in a joint operation between the Interpol and the Uruguayan police.[2]
Police officer Luis Chocobar is indicted by the judiciary, accused of murder, for shooting a thief who attempted to kill a tourist. President Macri receives him at the Casa Rosada, giving him his full support.[6]
Former president Cristina Fernández de Kirchner is indicted for allegedly obstructing investigation into the 1994 AMIA Bombing which killed 85 people, allegedly making a deal with the Iranian government to stop investigating Iranian officials involved in the attack in exchange for better prices on Iranian oil.[21]