Kyle Odom, the former Marine suspected of shooting Idaho pastor Tim Remington on Sunday, was arrested Tuesday evening outside the White House, according to Coeur d’Alene police and the Secret Service.

The Secret Service said in a statement that Odom “threw unknown material over the south fence line at the White House Complex.”

He was immediately taken into custody.

Hours earlier, someone posted a message to Odom’s Facebook page claiming Remington was shot because the pastor was “from Mars” and had “ruined” Odom’s life, according to Washington television station KXLY.

Odom’s Facebook profile picture also was changed to a drawing of an alien.