TRINIDAD -- For both families, the clock has ticked slowly as the weeks turn into months and then into years. On the outside is Keith Tarkington, whose kids are school-age now -- but he hasn't seen them since they were infants. On the inside are John Joe Gray and most of his family, who have sealed themselves in an armed homestead and haven't seen the outside world since Bill Clinton was president. "Nothing has changed," says Henderson County Sheriff Ronnie Brownlow, who was a chief deputy in December 1998, when a chain of events robbed Tarkington of his children and...