14-year-old reported missing after taking family dog for walk in Loudoun County

STERLING, Va. - Have you seen Emily Hernandez? 

The 14-year-old was reported missing after she left her home on May 1 to take her dog on a walk. 

The Loudoun County Sheriff's Office is asking for assistance locating her. 

Emily was last seen wearing black pants and a black shirt. 

If you have any information regarding her whereabouts, detectives want you to contact them at 703-777-1021.