There were media reports that Cardoso was known to the Secret Service from previous appearances at the White House during the Obama administration, though he has no record of arrests, according to court information, in Washington, D.C.
He was kicked out by two Secret Service agents assigned to Malia's detail.
A leg-barring Malia was spotted leaving her internship at The Weinstein Company in NY on Tuesday wearing a thigh-grazing, lumberjack-red, plaid shirtdress.
Barack and Michelle Obama's eldest daughter Malia, 18, was reportedly followed by a Brooklyn man the Secret Service accused of putting a banner up in the building where Malia interns, asking her to marry him.
On April 13, the man was detained by Secret Service agents and interviewed. The agents confronted the man, took down his information and made him leave, while the former White House resident slipped out of the office through a side door, as Opposing Views reported at the time. No charges have been filed, but New York City police are considering stalking and harassment charges.
They determined him to be emotionally disturbed and he was taken to an area hospital for a psych evaluation. Malia has also interned on the set of HBO's "Girls" during the summer of 2015 and also worked as a production assistant for Halle Berry's Steven Spielberg-produced CBS show "Extant". She is expected to enroll at Harvard in the fall.