 Meanwhile , Skinner visits the Lone Gunmen , who are monitoring UFO activity in the United States in the hopes of tracking down Mulder . Skinner later finds out that someone has used Mulder 's FBI pass to gain access to the X @-@ Files , and that the Bureau task force considers him the main suspect . Meanwhile , Doggett has gathered enough evidence to track Mulder 's whereabouts before his so @-@ called abduction , discovering that Mulder was dying and had his name engraved in his family 's gravestone to mark his death in 2000 . Later on , more evidence of high UFO activity in Clifton , Arizona is found by The Lone Gunmen . Concurrently , Doggett receives information about Gibson Praise ( Jeff Gulka ) when someone slips his file under his door . 
