The Secret Service said in a statement that the individual, whom it did not identify, was arrested on the south grounds without further incident after climbing an outer perimeter fence near the Treasury Department and East Executive Avenue at about 11:38 p.m. Friday.
Tran confessed to jumping the fence of the White House.
It did not contain any hazardous materials, the Secret Service statement said. Tran alleged that he had been followed, and his "phone and email communications (had been) read by third parties", and that he had "been called schizophrenic", ' Secret Service officer Wayne Azevedo said in the complaint.
That is when the officer stopped him, after which Tran said: 'I am a friend of the President.
Brian said his brother had been "living in his vehicle and eating junk food" and additionally said he had been "a very good brother to me".
Authorities did not find risky materials inside the backpack following a screening.
It was the first known security breach at the White House since Mr Trump took office almost two months ago.
A search of the south and north grounds of the White House complex found "nothing of concern to security operations".
The security level was reportedly raised and Mr Trump was informed.
Past presidents have also departed the south entrance of the White House when they head for the Marine One helicopter.
Another man wearing an American flag jumped the fence in November 2015.
Several people have managed to trespass on White House grounds in recent years.