Simplify the following text for a Grade 9 native English-speaking person.
Original: The series also introduced Agustin Guerrero , the original El Gato Negro of the early '50s and late '60s , as a major supporting character .
Simplified: The first El Gato Negro was Agustin Guerrero , a former luchador from South Texas who decided to use his skills to fight crime during the early '50s and late '60s . The current El Gato Negro is Francisco Guerrero , grandson to the original El Gato Negro .