Francisco Martin Duran, the man who allegedly sprayed the White House with bullets from a semiautomatic rifle Saturday, was charged with four felonies and ordered to undergo a 24-hour psychiatric exam. But the U.S. magistrate handling the case didn't release a letter found in Duran's truck that prosecutors say raises questions about his sanity. (Unofficially, they've said, it's a will.) Also in the truck, parked near the White House: a shotgun, an arsenal of ammunition, a gun magazine, a machete, sleeping bags and a stuffed animal. The 26-year-old Colorado man, who'll face another hearing Wednesday to determine whether he's competent to stand trial, disappeared Sept. 30. Federal investigators say he telephoned his wife once, saying he was never coming back and might be dead by a family member's birthday -- about now.