Inside a sobriety checkpoint

Sunday, September 2, 2007 | 9:48 p.m. CDT; updated 2:07 a.m. CDT, Monday, July 21, 2008

COLUMBIA — Shannon Smith, a full-time staffer at the Boone County Sheriff’s Department, has worked sobriety checkpoints for nine years. Usually, her job is moving cars off the road if the driver is taken aside for more tests.