Simplify the following text for a Grade 9 native English-speaking person.
Original: It was the hometown of Teresina Raiola , the mother of famous American gangster Al Capone , as well as Capone 's successor , Frank Nitti .
Simplified: It was the hometown of Teresina Raiola , the mother of famous American gangster Al Capone , as well Frank Nitti , another famous gangster .