His murderer , a thief of Basque origin , was hanged in public square by order of Juan Manuel de Rosas .
Achinelly died murdered in Buenos Aires on June 16 , 1845 .
Achinelly 's murderer , a thief of Basque origin , was hanged in public square by order of Juan Manuel de Rosas .
Achinelly died murdered in Buenos Aires on June 16 , 1845 .