The suspect, who has been  arrested for last Friday night's White House shooting, is suspected to be linked to Occupy Rally.

Oscar Ortega-Hernandez, 21, was captured on Wednesday at a hotel near Indiana, Pennsylvania, according to U.S. Secret Service.  Subsequently, the man was put into a police custody in Pennsylvania State. One abandoned car and an assault rifle which were later found helped authorities to find out Oscar Ramiro Ortega-Hernandez.

Ortega, who was supposed to be mentally ill, has a range of arrest record in three states, from domestic violence to drug charges.

For searching the suspect, authorities went into every tents of Occupy D.C. protesters, saying they are searching for a so-called terrorist who shot at the White House, according to protestor Ralph Wittenberg.

Some suspect Ortega is linked to Occupy rally.

Ortega may have spent time blending in with Occupy D.C. protesters, but he has not been linked to any radical organizations, according to U.S. Park police.

Meanwhile, investigations of the shooting incident have yielded two bullets on Tuesday. One of them broke a window, but it was stopped by protective ballistic glass behind the White House's historic external glass.

The shot was fired near the President Barack Obama's bedroom and the Lincoln bedroom and hence authorities concerned the gunman may pose a threat to the president.

Obama and First Lady Michelle were out for a trip to California and Hawaii at that time.

The second bullet was found on the exterior of the White House, the Secret Service said.

The authorities didn't mention who may have been in the building at the time, but they stated that no one was hurt in the Friday night shooting.

No comment came from the White House on the shooting or arrest report.

Secret Service, Washington and U.S. Parks police, the FBI, as well as Bureau of Alcohol, Tobacco and Firearms participated in the investigation of the shooting.

The White House has withstood many trials.

In 1994, a small plane broke into the White House compound and hit a tree. The pilot was killed.

In the same year, a Colorado-based Francisco Martin Duran sprayed the White House with at least 27 bullets from Pennsylvania Avenue, with an intention to assassinate President Bill Clinton. He was later sentenced to 40 years in prison.

The next year, Pennsylvania Avenue was closed to traffic for security reasons.

In 2001, Robert W. Pickett, a disgruntled ex-accountant who worked for the Inland Revenue Service, fired outside the White House. He was shot by Secret Service agents soon afterwards.