On Friday the 13th, Fairfax County officers conducted a sobriety checkpoint. The checkpoint was located on the Northbond lanes of the Fairfax County parkway close to the Walnut Branch road intersection. The checkpoint ran for three hours from 11:30pm until 2:30 am. Ten auxillary officers and eight police officers participated. Nearly 700 cars were stopped that night. For all that effort only one DWI arrest was made.