Complex sentence: He relentlessly pursued cocaine traffickers mainly belonging to the Medellin Cartel led by Pablo Escobar until he was assassinated on April 30,1984, by orders of Pablo Escobar and carried out by the hitmen group known as Los Quesitos for the rumored price of COP $500,000.
Split into simpler sentences: He relentlessly pursued cocaine traffickers mainly belonging to the Medellin Cartel led by Pablo Escobar until he was assassinated on April 30,1984. His assassination was ordered by Pablo Escobar and carried out by the hitmen group known as Los Quesitos for the rumored price of COP $500,000.