premise: Meantime, FBI agents and Metropolitan Police officers assigned to a joint terrorism task force here scanned the crowd of anti-abortion protesters at the annual March for Life on Capitol Hill, because Kopp has been either a participant in or arrested at this march in each of the last three years, according to another law enforcement official,
  Both officials requested anonymity.
  The FBI is conducting further DNA tests of the hair found outside Dr. Slepian's home. This more extensive set of tests could enable officials to declare an absolute match between the two hair strands, the first law enforcement official said.
  ``Ultimately, we would need to have a hair taken directly from Kopp himself to establish conclusively the hair from scene is his,'' the official added.
   What is the FBI more likely to be able to do if it conducts further DNA tests of the hair found outside Dr. Slepian's home?
hypothesis: declare an absolute match between the two hair strands