On June 3, 1962, aged 16, Perez migrated to Miami as part of "Operation Pedro Pan" during which thousands of Cuban children left their homeland.
After having worked at various jobs available to immigrants (delivering newspapers, cutting grass, selling doughnuts on street corners, picking tomatoes, etc.
Perez earned a Bachelor's in Education and a Master of Science in Human Resources with a specialization in exceptional children.
In 1996 he was elected as a member of the Miami-Dade County School Board,[citation needed] representing District 5.
Among Demetrio's main achievements are: In 2002, Perez pleaded guilty to felony charges of defrauding three elderly tenants in low-income Little Havana apartments that he owned.
[5] The original indictment alleged that Perez operated a scheme to defraud the Section 8 program of the U.S. Department of Housing and Urban Development, and charged him with mail fraud, conspiracy to commit mail fraud, and making false statements on federal forms.
On September 14, 2020, the Herald ended all business relations with Libre after multiple instances of anti-Semitic and racist commentary in the supplement that the newspaper hadn't been aware of.