We will not rest until every one of them is caught and brought to justice, schools police chief Edwin Lopez said.
Earlier, officials revealed that Carvalho had never signed a $15.3 million contract with the online platform at the center of the crisis.
Ron Steiger, the Miami-Dade County school district's chief financial officer, made the announcement Wednesday during a school board meeting to discuss the failures of K12's online platform, My School Online, the Miami Herald reported.
And the district could only measure one-time log-ins, not sustained participation, which is a feature offered by My School Online.
Republican U.S. Sen. Marco Rubio has requested a briefing with the Department of Homeland Security on cybersecurity as it relates to school districts.