The man who shot and killed former Prime Minister Shinzo Abe has told police he test-fired his homemade gun at a facility connected to a religious group he believes has links to the dead Japanese leader, investigative sources said Sunday.The assailant, Tetsuya Yamagami, said he harbored a grudge against the religious organization after his mother made a "huge donation" to it, according to the sources.Investigators believe he was testing the weapon's lethality ahead of a planned attack, although further details about the site where he conducted the test are yet unknown.Yamagami denied Abe's …READ FULL ARTICLE