WASHINGTON - A white supremacist who gunned down a guard at the Holocaust Museum had a notebook of anti-Semitic rants in his car, in which he denounced President Barack Obama as a Jewish puppet, a legal document showed Thursday.

"The Holocaust is a lie. Obama was created by Jews. Obama does what his Jew owners tell him to do," said some of the handwritten notes found in the car that James von Brunn, 88, had left outside the US Holocaust Memorial Museum in Washington moments before he fatally shot security guard Steven Tyrone Johns.

"You want my weapons - this is how you'll get them," the ranting notes continued, according to an affidavit filed by an FBI special agent who is taking part in the probe of von Brunn.

"Jews control the mass media ... Jews captured America's money," still more notes read.

All of the handwritten notes were signed "James W. Von Brunn," said the affidavit, describing von Brunn as "a known white supremacist who has espoused hate speech directed specifically towards Jews for an extensive period of time."

In a short novel entitled "Kill the Best Gentiles," which von Brunn claims to have written, the suspect detailed how he "believed the government was being run by Jews and the Jews were looking to extinguish the white race," the affidavit said.

The legal document traced von Brunn's movements from the moment he pulled up outside the museum in the heart of Washington's tourist district, just footsteps from the White House, to when two of the fallen security guard's colleagues stopped von Brunn's rampage by shooting him in the face.

The entire bloody incident, which sent visitors to the museum scrambling for cover and fleeing to safety outside, was captured by the museum's videotape surveillance system and subsequently viewed by the FBI.

After the attack, bomb dogs were brought in to sniff von Brunn's car for explosives "and indicated a positive hit."

But what the affidavit called "a cursory search" found no indication of an explosive device - although officers did recover the notebook with von Brunn's rants.

Meanwhile, at the museum, Washington police officers recovered several .22 and .38 caliber cartridge casings and a .22 caliber rifle loaded with 10 live rounds of ammunition.

And in a search of the apartment in the Atlantic coastal city of Annapolis where von Brunn rented a room, agents recovered more .22 caliber ammunition and a 30/30 rifle, as well as ledgers, journals and manuscrips, the affidavit said.

Von Brunn, who is still in critical condition in hospital, will be charged with murder and killing in the course of possession of a firearm in a federal facility, officials said Thursday.

If convicted, he faces life in prison without parole and could even face a death sentence, acting US attorney Channing Phillips said.