If this is supposed to be a portrayal of the American serial killer, it comes across as decidedly average.
A journalist [Duchovny] travels across country to California to document America's most famous murderers, unaware that one of his white trailer trash travelling companions [Pitt] is a serial killer himself.
Rather predictable throughout, this has its moments of action and Pitt and Lewis portray their roles well, but I'd not bother to see it again.