John Bacon

USA TODAY

The former Marine arrested outside the White House on an attempted murder warrant from Idaho wrote a 21-page manisfesto claiming that the pastor he shot in Coeur d'Alene was an "amphibian-humanoid from Mars."

Kyle Odom, 30, was taken into custody Tuesday after throwing "non-hazardous" materials onto the South Lawn, the Secret Service said in a statement. Coeur d'Alene Police Chief Lee White said the materials included flash drives with his manifesto.

Odom says in the manifesto, sent to The Washington Post and other media organizations, that he wrote a letter to President Obama because he is certain Obama knows about the Martian humanoids among us.

Odom had been the subject of a manhunt since police say he shot the Rev. Tim Remington several times in the parking lot of the Altar Church in Coeur d'Alene after services Sunday. Remington remains hospitalized in stable condition.

Odom, who has a history of mental illness, claims on the first page of his manifesto that he is "100% sane, 0% crazy." He then explains that his life was ruined by an intelligent species from Mars whose technology is "millions of years" more advanced than ours. The Martians wanted him as a sex slave as part of their breeding stock of humans whose offspring walk among us, Odome said. Martians from Mars live deep in the Earth, he says.

He lists 16 senators from both parties, including Senate Majority Leader Mitch McConnell, and dozens of House members as "noteworthy Martians." Dozens of Israeli leaders also made the list.

Odom says he shot Remington after the pastor's "true face" as a Martian briefly appeared while Remington was attempting to persuade Odom to become a pastor himself.

"My last resort was to take actions to bring this to the public's attention," Odom says. "Just realize that I'm a good person, and that I am completely innocent. Also realize that the 'people' I killed are not what you think."

White said that another church member named in the manifesto was safe. There is no evidence that Odom actually killed anyone. White said Odom apparently flew from Boise to Washington on Monday. He said he did not know how Odom, with a felony warrant out for his arrest, was able to board the plane.

The Secret Service said they were working with officials in Idaho. White House Press Secretary Josh Earnest, at a briefing Wednesday, noted that Odom faces serious charges in Idaho, but added that "given where this individual was detained, the Secret Service has some questions for him as well.”

Odom's family issued a statement saying it was thankful Odom was captured without further incident.

"As Kyle was not living with us, we are learning of his plans as they are being revealed by the police," the statement said. "We are truly thankful to God he is safe and no one else is injured. Please respect our family's privacy at this difficult time."

Contributing: Gregory Korte; WTVB in Boise, Idaho