Alexander Buckley pleads guilty to killing Siohban Lee

A D.C. man accused of killing an 18-year-old woman he met through a social media site has pleaded guilty Friday to the shooting.

Alexander Buckley, 22, pleaded guilty to second degree murder for killing Siohban Lee on Jan. 25.

Authorities say Buckley and Lee met on “Tagged,” a social media site that allows users to post profiles and contact one another. The two agreed to meet near 5th and Nicholson streets NW on the day he killed her.

When they met, Buckley shot Hall in the head, killing her, police say. He then stole her phone and iPod but left her purse.